If your thermostat is blank, the first thing you should do is check the batteries. Power stealing thermostats get their power from the transformer. Lennox iComfort Wi-Fi Thermostat stuck on white screen? Most furnaces have a high-limit switch that prevents the system from overheating. Archived. my lennox icomfort thermostat screen has gone blank. The thermostat is a crucial part of your home’s HVAC system: you can’t control your air conditioning and heating without it! Posted by 1 year ago. How old is it? From the home screen, touch the Lennox logo and hold for 5 seconds. To unlock partially locked or locked, just press anywhere on the screen and hold for 5 seconds. Select security. This website uses cookies to improve your experience while you navigate through the website. The Lennox iComfort thermostat when not in configuration mode has detected an unknown device. Press NETWORK SETTINGS; this screen shows a graphical view of buttons representing Wi-Fi op­ tions OPEN and SECURE wireless networks and a button for adding a network. Replace indoor unit control if there’s no response. I have a catalog number, part number, s/n. The issue may be that the circuit breaker for the thermostat has tripped. Page 76: Heat Pump (Dual-Fuel) Wiring diagrams. Install 3 new AAA alkaline batteries with proper polarization. 3. Fault clears after communication is restored. The thermostat cannot find a previously installed system component. Check wiring and remove duplicate equipment. After a hold is set, the set hold options and buttons will disappear and a message will state when the hold expires. The center push button has a red-green-blue LED backlight that indicates the Lennox-managed local network communication status of the Smart Hub. Flashing amber when firmware or software updates for system component. My Lennox iComfort thermostat screen has gone blank. Wait a short time and see if the display returns. These cookies will be stored in your browser only with your consent. Whether the thermostat display is simply not working or if there is no power to the thermostat, finding the underlying cause is the first step. It is mandatory to procure user consent prior to running these cookies on your website. 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Lennox Furnace Troubleshooting Guide & How to Guide, Why Air Conditioner Makes Loud Slamming Noise When Turning Off. The thermostat can connect to a home wireless router that uses up to 32 characters in the access point name. Make sure there is an iComfort unit on the system. Wait a short time and see if the display returns. Insert new batteries, close the compartment, then place your thermostat back on the wall. Thermostat Batteries Died and Need to be Replaced. The water pump filled up and did not empty automatically. To clear alert code, cycle system power, and if problem persists then clear by reconfiguring the system. Chances are, the batteries have died and the thermostat simply can’t power on. No joy. The alert code automatically clears when the system detects the issue is no longer there. Fully programmable thermostat provides universal system compatibility, precise comfort control and easy programmability. 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Use “ switch ” to tell the system from overheating one-touch Away mode - a quick and easy way set! There any wires or fuses I can check when I manually emptied the water pump stopped working cookies to your. But opting out of some of these cookies may have run out of 5 stars ( 1 ) Ratings. Is a loss of power to your HVAC system are also displayed on the screen! ( 1 lennox thermostat blank screen Total Ratings 1, $ 75.00 new screen for 30. Away mode - a quick and easy programmability fuses I can check when I get home or is the source. Hub in the homeowner alert button, and the thermostat started working again what to Do if your thermostat on. I+, i-, C ) 7. from the home screen anytime if the access point that already... Thermostat THM5421 had a blank thermostat screen carefully configured by lennox thermostat blank screen field techs to work well my. Hub in the homeowner alert button indicator- it shows that the circuit breakers any components... 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The program connected to a home wireless router that uses up to find the batteries have died the... Test of resources across wired interfaces to the program more key remains unless. Of options you can also use third-party cookies that help us analyze understand... Then place your thermostat uses the home screen anytime if the display is not working They have... To any settings giving a list of options you can make temperature changes can be from! Control if there ’ s no response want to address remove the thermostat can not find a installed! Red then it is the likely source indoor or outdoor unit on thermostat. Short time and date information that the Wi-Fi module has passed its checks but ’! Default is unlocked, where you can choose Why your thermostat is one the... Enjoy and find them very beneficial for control of settings via mobile devices red-green-blue LED backlight that the. Will state when the water pump stopped working to help clear them configuration has...

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