Why would my Honeywell thermostat go blank?
Why would my Honeywell thermostat go blank? If your thermostat doesn't run on batteries and is wired directly to your home's electrical system, a blank screen may indicate that there is no power going to the unit. What can cause this to happen? It could be due to a tripped breaker or a problem with the wiring. What can I do if my thermostat is not working? An unresponsive thermostat can fix by cleaning the thermostat from inside for any dust and dirt accumulation. And check for some loose wiring behind the faceplate and a freshly charged batteries, weak batteries...