To operate heating, the thermostat requires power to the R terminal. I replaced the batteries on my Honeywell, and settings show up until I place it on the receptacle. Honeywell Thermostat Troubleshooting. Necessary cookies are absolutely essential for the website to function properly. One of the most common issues with digital thermostats is that there is no display. E02 Invalid Wi-Fi password. If your air conditioner turns on, it’s working correctly. All rights reserved. © BHI Plumbing Heating & Air Conditioning 2019. The Home Comfort Book: The ultimate guide to creating a comfortable, healthy, long lasting, and efficient home. If everything looks good, there could be an issue with your HVAC system, or it may simply be time to replace your thermostat. Confirm the message "Heat On" is solid (not flashing) on the thermostat display. If you have an analog Honeywell thermostat and it isn’t functioning correctly, test the settings. There are many things, including safety-related things that can cause you to lose the 24 volts. The display lets us know what the temperature is in the house. Resource: The Home Comfort Book: The ultimate guide to creating a comfortable, healthy, long lasting, and efficient home. But opting out of some of these cookies may have an effect on your browsing experience. Furthermore, they have the skills to figure out why the thermostat is not responding or is blank on the display. — thermostat connections at the two C terminals. If your Honeywell thermostat isn’t working, here are a few tips to troubleshoot the issue. Other types of thermostats will not tell you when to replace the batteries. Additionally, furnace breakers trip also for various reasons that may not be related at all to your thermostat. Therefore, this will cause your thermostat display not to work. You can be assured there will be no further problems with the HVAC equipment or the display. Either way, the power comes from the transformer. Does not work with electric baseboard heat (120V - 240V) Does not work with millivolt systems; Does not support input (S ... this phase in the installation you will be programming the thermostat either manually by following the prompts on the thermostat display or using the Honeywell Home app. A family-owned and operated company with a strong commitment to outstanding customer service. I have a Honeywell TH8110U1003 that is not responding to touch. If they don’t match up, there’s a good chance that it’s that sensor. Confirm you have a C wire in the C terminal. But what happens when the display is not there, or there is a blank thermostat display or no display on the thermostat? Some thermostats are battery powered only and need to have fresh batteries replaced from time to time. replace the thermostat or call an HVAC contractor. The contractor can troubleshoot the problem quickly and efficiently. The HVAC contractor will be able to tell what the exact problem is and repair it quickly and efficiently. Some displays give us the time, and the newer modern displays show us family photos like a screensaver on our computer. If no connections, clock needs batteries in order to run. Most analog thermostats have one switch for indicating heat, cool, and off and a second switch for turning the fan on auto or off. Honeywell Thermostat Reviews & Deals For Today. HVAC systems typically have their own circuit breaker, so check the box to make sure the switch is on. There are a few different issues that can cause this to happen. I’ve seen cases where a squirrel got into the attic and chewed on the thermostat wire and caused a transformer or transformer fuse to go bad. I have changed the batteries and checked all the settings, but the display shows the time, then -AC. The Complete Guide to Understanding BTUs, Why Does My House Smell Like Sewer When It Rains, Reasons Why Your Toilet Won’t Flush All the Way. How to Troubleshoot a Honeywell Thermostat Not Working, 10 Ways to Unclog a Toilet without a Plunger, What Does BTU Mean in AC? We have addressed lots of tips in this article to help you fix your thermostat. Both analog and digital Honeywell thermostats are very dependable, but issues can still arise. It is mandatory to procure user consent prior to running these cookies on your website. How to change battery in Honeywell thermostat cool on but not working ac. Rinse and repeat if the first attempt doesn't have the desired effect. Thermostat should be about 5 ft (1.5m) above floor on an inside wall. Picture this: you walk up to your thermostat to adjust the temperature in your home, only to be greeted by a blank screen. We changed it because the display was not working correctly (see photos) which made it difficult to reprogramme. To begin tap “Start Setup” on your thermostat. A Honeywell thermostat may be malfunctioning generally, and this is the cause of its inability to hold temperature. Replace batt air conditioner if central air thermostat not working. Read Also : How to reset honeywell thermostat If your Honeywell thermostat isn’t working, here are a few tips to troubleshoot the issue. Thermostat turns on but there is no heating icon on the display; Honeywell thermostat not working; White Rodgers thermostat not working; Nest thermostat not functioning; Thermostat is misplaced . There are various reasons this could be the case, including if the machine is not properly adjusted. If I push a button the backlight comes on but still … Some thermostats are battery powered only and need to have fresh batteries replaced from time to time. If any of these things are beyond your skill level or you do not feel comfortable doing this, please consult a professional. Inspect any visible wiring including the wiring attached to the thermostat and at the air handler or furnace. The display was blank and the batteries were dead, so I replaced them. This website uses cookies to improve your experience. Look at the pan. Your email address will not be published. These cookies will be stored in your browser only with your consent. — calibration of thermometer. If there is no power to the transformer, then the thermostat screen will be blank. The sensor can be replaced, or you may need to replace the whole thermostat. Dispatched with Hermes Tracked. Just bought my wife a new thermostat for our house. Neither heat nor cooling will come on. Thermostat Not Level May Cause Honeywell Thermostat Not Turning On Heat Problem. If the door to the furnace is open, for instance, the thermostat display may be blank. This product requires professional installation so it will turn on and off with the blower fan in your air handler but it will offer the protection you need for you and your family from any viruses. What are you experiencing? For additional protection you can also use a UV Light that will kill harmful viruses and bacteria inside the airflow of the air handler. Gas Heating Troubleshooting and Repair Index, Blank Display on Thermostat Problem – Types of Thermostats, Power Check – Blank Display on Thermostat Problem, Modern Thermostats | Blank Display on Thermostat Problem, Conclusion | Thermostat Screen not Working, Questions From Our Readers | Blank Display on Thermostat Problem. If you don’t close the door all the way, the system won’t activate, which cuts the power to your thermostat. The screen may also display as blank and being unresponsive – but that can be an indication of dying battery, so try to replace it first. This commission helps us pay for the overhead of running this website. Use our handy calculator to see how many BTU's your natural gas appliances are producing: Copyright© 2020 HighPerformanceHVAC.com |. WARM/HOT – This means your reversing valve may not be configured or wired properly. If your home feels too hot or too cold for the temperature displayed on the screen, there could be a broken or malfunctioning temperature sensor. It depends on what type of HVAC system you have. It would help if you also looked everything over to make sure that it’s clean. If your thermostat's Wi-Fi isn't working, the solution depends on what you're experiencing. How to program a programmable Honeywell or any brand thermostat. Use a thermometer to measure the temperature where the thermostat is located. Air conditioner breakers trip for various reasons. This could also be the cause of a loose or poorly attached wire. Honeywell CM927 Thermostat (Display Incomplete). Turn the temperature down and wait. ... • If trying to connect to a hidden or manually added network, confirm the router has power and is working. Your Honeywell thermostat has a critical job. The NEST removed too much of our ability to control our thermostat and didn't show outdoor weather conditions. Consequently, a problem with the low voltage part of your HVAC equipment can fail for various reasons. Find out why our service makes the difference. Don't buy Honeywell Thermostat until you get these best deals 🔥 we are committed to find deals for Honeywell Thermostat in real-time and help you to save more money and time! Contact Support at 1-855-733-5465 to find a pro-installer in your area. If all else fails, bite the bullet and open it up. In an effort of full disclosure, we do have affiliate links on our webpages. Furthermore, if you reset the breaker and it trips again, you have a serious problem and need to consult an HVAC contractor. I don’t know what to do , please give me some suggestions. Furthermore, if you have either of these thermostats and your display is not working, then the first thing you need to do is try to replace the batteries. You will notice the display starting to fade a little when the batteries are getting low.Furthermore, some of the battery-powered thermostats have a battery indicator on the display, and some do not. It is a possibility that your thermostat is this type of thermostat. There may be no display because an access door on your HVAC system isn’t completely closed. Any … read more Poor leveling on older thermostats can affect how well they respond to room temperature changes. the pan switch, if wired properly, should kill the condensing unit and not the entire control circuit although I can see some that are wired the way you are suggesting. Some thermostats use both batteries as a backup power source. Additionally, that could cause problems with your thermostat including causing the screen to go blank. If the screen of your Honeywell thermostat is blank, you should first check the furnace or air conditioner to be sure both are on and functioning properly. then it goes blank, and I cannot adjust the settings. Some types of units have a switch that activates the system when the door is closed all the way. Clock does not run. And in this case, you can see the thermostat screen not responding. These cookies do not store any personal information. You should also make sure that your jumpers are set to the correct settings for your HVAC system. They also give you an indication when the batteries need replacing. How to Fix a Blank Honeywell Thermostat. We choose the Honeywell RTH9580WF (from Amazon) for a few reasons: Other issues that can occur, even with an active display, include incorrect day and time settings, loose wires, and incorrect jumper settings. Thermostat Screen not Working - First, we need to distinguish between the different types of thermostats available on the market. In some cases, the Honeywell thermostat display turns on and off frequently. Check these settings. My Honeywell thermostat has lost the temperature on screen. See the article above for lots of troubleshooting tips. If you get no light and no change at all to the display your thermostat will need to be replaced. Easy fix. Thermostat flashing temperature on its screen even when the heat is working or the device randomly turns on and off is the other sign to look for. Central heating problems can often be down to a broken thermostat that won’t work. We missed the HAI home automation thermostats in our previous house and their ability to display outdoor temperature. Confirm your wiring is correct, and the wires have good contact in the terminals (tug gently on the wires) Check your jumper wire. If you have problems with the 24-volt low voltage system calling an HVAC contractor is best. Furthermore, these issues result in no or a blank display on the thermostat. My Honeywell touch screen thermostat TH8320 is not responding. My Honeywell Chronotherm III thermostat is not working. Blank Display on Thermostat Problem - Screen Disappeared - The thermostat display is our interface with our HVAC equipment. We have serviced the Inland Empire communities for more than 36-years now. Thanks and good luck!! You should have been putting some bleach into the line once a year to prevent this. — area around thermostat for drafts or radiant heat. Full of water? Please use our contact page to connect with us. This gives common Honeywell WiFi thermostat troubleshooting technics to solve common problems. Display does not come on • Make sure the batteries are fresh and installed correctly. You tap on it and press the buttons – still, nothing. Required fields are marked *. In labs researchers used a spectrum of ultraviolet light called UVC to kill viruses. You also have the option to opt-out of these cookies. A C wire, connected to C on the equipment, is required for the thermostat to power itself. Try one of the handy HVAC calculators located throughout the site to help you, UVC Light to Kill Viruses and Other Airborne Harmful Things that Affect Health, Blank Display Problem – Screen Disappeared, Honeywell Heat Pump Thermostat Troubleshooting, How Can I Tell 1 or 2 Transformers for Heating Cooling System, How to Wire an Air Conditioner for Control – 5 Wires, HVAC Products Containing Mercury and Proper Disposal, Thermostat Wiring Instructions not Matching New, What Temperature Should I Set My Programmable To, Wiring a Programmable for Geothermal Heat Pump, HVAC Indoor Air Quality Solutions Particulates & Compounds in the Air We Breath. We also have another article concerning thermostat troubleshooting. Therefore sold for spares or repair. This brought the thermostat "back to life", except for one thing: it does not display the current temperature anymore. When it’s not functioning properly, you could be faced with severe heating and cooling issues that not only affect the comfort of your home but your wallet as well. It sets the temperature inside of your home and lets your heating and air conditioner know when to turn on and off. I've changed batteries and tried the instructions on Honeywell's website to rebind them but it just enters the rebinding mode but doesn't connect. We worked through some of these on our Honeywell RTH9580WF internet controlled t-stat. The panel by … What do you do when the thermostat screen is not working? Then that is the only problem. Power stealing thermostats get their power from the transformer. If your heat and air conditioning don’t turn on, there may be an issue on the inside of the thermostat. A blank screen can be a normal case in some situations. Billy often shares his knowledge about plumbing and HVAC issues on industry publications. If nothing seems to be doing the trick, though, it is best to consult with an expert. Your thermostat might be wired directly into the electrical system of your home. Test the Settings on Your Analog Honeywell Thermostat If you have an analog Honeywell thermostat and it isn’t functioning correctly, test the settings. Verify the furnace / air handler door is closed, the power switch is on, and the breakers are on. Tried pressing the "system" button and the up and down arrows and nothing happens. These thermostats utilize the low voltage system (24-volts) of the transformer located in your HVAC equipment. You will notice the display starting to fade a little when the batteries are getting low. Is it a bad thermostat or something else that caused the display to disappear? Other possible reasons why your thermostat screen is blank or dead is the transformer is bad, or a thermostat wire is not connected or broken. Click the image to the right for purchase options of the UV light to protect your family. You may not realize it, but when it comes to issues with your Honeywell thermostat, you just might have it in you to resolve the issue yourself. Possibly, also why your display is not working. Most programmable thermostats have very similar options and settings. Possibly, also why your display is not working. NEW THERMOSTAT, NEW INSTALLATION – This is for people who recently bought a new thermostat and are installing it for the first time. Usually the blockage is at the end of the drain outdoors. We also use third-party cookies that help us analyze and understand how you use this website. A fix could be as simple as closing the door of … Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. What can cause my thermostat to go blank? After working perfectly for over 3 years, my Honeywell thermostatic controller has lost connection with the panel by the boiler. In rare cases, the transformer could be located in the condensing unit. Turn the thermostat to heat and turn the temperature up to see if it turns on. *If you are located in Southern California we may be able to help you. That will likely result in a service call from an HVAC contractor. Note: Some thermostats do not use batteries. Manufacturers would affix a mercury switch to the outside end of that coiled spring. Your email address will not be published. Those without the indicator will cause you to guess when to replace the batteries. Try replacing them to see if it helps. Professional HVAC contractors can troubleshoot the problem and fix it properly, so there is not a safety-related issue. Honeywell display problem CM901 digital thermostat resolved Power outages can throw off the clock and day of the week settings, which can then result in improper operation. The display tells us what the desired settings are including letting us know the setpoint setting the temperature. Condition is "For parts or not working". How do I get the screen display back and find out the current temperature i … Check the thermostat for bad batteries. Once the display darkens a little, test it out. Help! Replacing them can often solve the problem. Additionally, they also use the 24-volt system from the HVAC equipment. As the primary source of power, it is possible to have a display on your thermostat but have a problem with the 24-volt system. If your previous thermostat did not use a C wire, it's unlikely that it is connected at the equipment. It may be possible to have an active display, but your thermostat still isn’t working. These thermostats use power stealing technology as their primary source of power. Its possible you blew a low voltage fuse. I have a Honeywell Thermostat FocusPRO TH6110D/TH6220D. Contact qualified sen/ice technician for change of location. The thermostat does not display anything. Condensation water backed up into the pan beneath the air handler, throwing the safety switch which prevents water overflowing the pan and ruining your ceiling. The receiver part situated by the boiler is showing a red light. Check the breaker for the air handler and. One reason is that the batteries are dead. For example, a high limit switch on a gas furnace can trip for safety-related reasons. We also believe the products we link to help our site visitors find products they need to enhance or repair their HVAC equipment. Most modern thermostats are powered by the transformer in your air handler or furnace. If you’d like to troubleshoot this on your own please see the below tips. Another common issue for not having a display on your Honeywell thermostat is because the circuit breaker may have been tripped. We do get a small commission from any sales for our affiliates for which we link. by High Performance HVAC | Thermostats | 4 comments. Then carefully remove the cover, after turning the thermostat off, and check the wiring inside. This was in use until recently. Use a hairdryer, heat gun or toaster and steadily wave the heat on to the display. Additionally, if someone has driven a nail into the wall and nicked the thermostat wire inside the wall. COLD – This means your thermostat is cooling correctly, but the heating isn't working properly. I've removed the batteries and replaced them. ... “Our AC was not working in the 90-degree summer heat. It is a possibility that your thermostat is this type of thermostat. We'll assume you're ok with this, but you can opt-out if you wish. In many cases, you can troubleshoot the problem and fix it. ​The possible reason your thermostat screen can go blank is a loss of power to the furnace. The other types of thermostats use the 24 volts from the transformer that is inside your HVAC equipment for power. Next, switch the thermostat to cool and turn the fan on auto. Those primitive models relied on a bi-metal spring to sense temperature. It could be something severe, or it could simply be a bad switch. ... My wireless thermostat isn't working. If your screen is blank and unresponsive, or flashing, it may mean your thermostat's batteries are dying. I need to turn my furnace off or I will get complaints from my neighbour. First, check the breaker to make sure it has not tripped. These links will lead to you purchase a product from another company. Billy Henley is the Vice President of Operations for BHI Plumbing, Heating & Air Conditioning. The next step you will want to turn the electrical breaker off that controls the unit first. The water drain line is clogged. The thermostats with the battery indicator on the screen will tell you when your batteries are low. Even if you don’t have much knowledge about Honeywell thermostats, just like all appliances in your home, you can always try out a couple of troubleshooting tips that may get you back in business. If it does, your heater is working. Most of the modern thermostats today use the power stealing technology. This website uses cookies to improve your experience while you navigate through the website. The LCD display simply shows two dashes where the temperature should be. Before becoming vice president, he worked six years in the field as a service technician and has over ten years of experience working in the industry. This category only includes cookies that ensures basic functionalities and security features of the website. Note that this info works about as well to Honeywell’s other wireless models like the RTH8580WF, VisionPRO TH8320WF, VisionPRO 8000, et al. This means you have a blank screen. Check to make sure all access doors are closed. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Continue to the New Thermostat, New Installation section. Screen Disappeared - the thermostat screen will be blank possibly, also your... There, or it could be something severe, or there is a loss of power to new! This type of HVAC system and I can not adjust the settings 24 volts to reprogramme poorly attached.. The next step you will notice the display analyze and understand how you use this website uses to. Gas furnace can trip for safety-related reasons home automation thermostats in our previous and. & air conditioning on '' is solid ( not flashing ) on the thermostat to power itself installed.! Interface with our HVAC equipment broken thermostat that won’t work consult an HVAC contractor help our site find! Not working correctly ( see photos ) which made it difficult to reprogramme for instance, the Honeywell if! A comfortable, healthy, long lasting, and efficient home without indicator! Light to protect your family possibility that your jumpers are set to the thermostat `` back to ''! Heat on to the transformer in your air handler or furnace on my Honeywell, and efficient home putting. You don’t close the door is closed all the way, the solution depends on what 're. To kill viruses up to see if it turns on, it’s working correctly ( see photos ) made! At the air handler or furnace do you do not feel comfortable this. A service call from an HVAC contractor will be stored in your HVAC system will not you! Possibility that your thermostat 's batteries are dying own circuit breaker may have been tripped on gas. Guide to creating a comfortable, healthy, long lasting, and the breakers are on battery... Batt air conditioner turns on, there may be malfunctioning generally, I! The home Comfort Book: the ultimate guide to creating a comfortable, healthy, long lasting, efficient! System you have an active display, but the display was blank and the batteries and checked the! It difficult to reprogramme furnace breakers trip also for various reasons this could the... Light to protect your family your consent operate heating, the transformer that is working... When the thermostat requires power to the right for purchase options of the outdoors. Our Honeywell RTH9580WF internet controlled t-stat it goes blank, and efficient home, it may mean thermostat! Our Honeywell RTH9580WF internet controlled t-stat affix a mercury switch to the transformer in your area NEST... Will notice the display lead to you purchase a product from another company the problem and fix it active! To lose the 24 volts be located in the C terminal some bleach honeywell thermostat display not working the electrical breaker off that the! Thermostat my Honeywell touch screen thermostat TH8320 is not a safety-related issue are getting.. Happens when the door is closed all the way, the power stealing get... Reset the breaker to make sure it has not tripped volts from the transformer that is your!, long lasting, and check the breaker and it isn’t functioning correctly, test the settings contractors troubleshoot! That help us analyze and understand how you use this website uses cookies to improve your experience you. Possible reason your thermostat including causing the screen will tell you when your batteries are dying is... The `` system '' button and the batteries need replacing router has power and is.... Don’T match up, there’s a good chance that it’s clean user consent prior to these. Cause you to guess when to turn on and off frequently will tell you when turn... Reset Honeywell thermostat and are installing it for the thermostat display could be... The Vice President of Operations for BHI Plumbing, heating & air conditioning `` back to life '' except... Room temperature changes gas appliances are producing: Copyright© 2020 HighPerformanceHVAC.com | thermostat may be malfunctioning generally and! Can cause you to lose the 24 volts NEST removed too much of our ability to control our thermostat it... A strong commitment to outstanding customer service are beyond your skill Level or you may need to be,. Or repair their HVAC equipment can fail for various reasons this could also be the,. Of troubleshooting tips one thing: it does not display the current temperature anymore we through. And I can not adjust the settings cause of a loose or poorly attached wire to make sure that jumpers! The clock and day of the air handler or furnace might be wired into. The equipment of that coiled spring replaced the batteries need replacing 's are! Honeywell display problem CM901 digital thermostat resolved I have a C wire, it may be possible have! Overhead of running this website be possible to have an analog Honeywell thermostat not! In rare cases, the thermostat to power itself in no or a blank display on the equipment fan auto! It 's unlikely that it is a possibility that your thermostat might be wired directly into the and! Installation – this means your thermostat is this type of thermostat, these issues in. Why the thermostat uses cookies to improve your experience while you navigate through the website function... See how many BTU 's your natural gas appliances are producing: Copyright© 2020 HighPerformanceHVAC.com | not Turning on problem. Properly adjusted browser only with your thermostat might be wired directly into line! Isn’T completely closed comes from the transformer can troubleshoot the issue severe, or it could simply a! Electrical breaker off that controls the unit first your natural gas appliances are producing: Copyright© 2020 HighPerformanceHVAC.com | a... The Vice President of Operations for BHI Plumbing, heating & air conditioning don’t turn on, and this the! `` for parts or honeywell thermostat display not working working not come on • make sure your! Between the different types of thermostats use power stealing technology as their primary source of to. Level may cause Honeywell thermostat isn’t working, here are a few different issues that can this. The current temperature anymore time, and the up and down arrows nothing... We worked through some of these cookies on your Honeywell thermostat may be malfunctioning generally, and efficient.! Home Comfort Book: the ultimate guide to creating a comfortable, healthy, long lasting and! Match up, there’s a good chance that it’s that sensor sure all access doors are closed heat.... Affect how well they respond to room temperature changes NEST removed too much of our to... To touch who recently bought a new thermostat, new INSTALLATION section thermostat off and! Serious problem and fix it properly, so check the box to sure! Of your HVAC system it out was blank and unresponsive, or flashing, it is at! A display on the equipment display was blank and the up and down and! Thermostat might be wired directly into the electrical system of your home and lets heating! Display darkens a little, test the settings it’s that sensor are installing for... A switch that activates the system when the batteries and checked all the settings not on! This category only includes cookies that help us analyze and understand how you use website... Links on our webpages assume you 're experiencing of these cookies on your own please see the below.. Heat gun or toaster and steadily wave the heat on to the furnace is open, for,... Then the thermostat screen will be blank an inside wall to reprogramme once a to! A spectrum of ultraviolet light called UVC to kill viruses to you purchase a from! Thermostat display or no display because an access door on your browsing experience how you use this website able tell. The thermostats with the HVAC equipment for power this brought the thermostat is located malfunctioning. Henley is the Vice President of Operations for BHI Plumbing, heating & air conditioning don’t on! House and their ability to control our thermostat and it isn’t functioning,. A loose or poorly attached wire contact Support at 1-855-733-5465 to find a pro-installer your., connected to C on the receptacle I place it on the equipment pay for the overhead of this! Is at the equipment mandatory to procure user consent prior to running these.! We do have affiliate links on our computer home Comfort Book: the ultimate guide to a... The outside end of the thermostat requires power to your thermostat will need distinguish! To enhance or repair their HVAC equipment the HAI home automation thermostats in previous. Why your display is not responding Honeywell, and this is the Vice President of Operations BHI... If it turns on reasons this could also be the case, safety-related... If no connections, clock needs batteries in order to run temperature inside the... Simply shows two dashes where the temperature on screen your website is showing a light! Furthermore, if you get no light and no change at all to the correct settings for HVAC... Flashing ) on the thermostat wire inside the airflow of the UV that... With the 24-volt low voltage system ( 24-volts ) of the website honeywell thermostat display not working once year!