How to Reset a Honeywell Programmable Thermostat Set the thermostat switch to “Off.” Insert a coin into the slot on the battery door to push it open. Remove the batteries. Insert the batteries backward, so that the negative pole lines up with the positive terminal. Remove the batteries and put them back in the correct way, then close the battery door. Click to see full answer. Thereof, how do I reset my Honeywell thermostat?You can also click here to learn how to reset your thermostat. To perform a factory reset, press and hold the settings button while you remove and re-insert one battery. You’ll then need to re-link your doorbell push button and any other Honeywell ActivLink devices.Subsequently, question is, how do I reset my Honeywell thermostat th4110d1007? Resetting Your Thermostat To reset your thermostat’s scheduling, simply hold down both the “SET” and “RUN” buttons for a few seconds to reset the unit to the default settings – a cost-effective heating and cooling schedule suggested by EnergyStar. Just so, how do I reset my thermostat? Here are the steps you need to take to reset your AC thermostat. Shut Down Your AC at the Thermostat. The first step in resetting your AC thermostat is to turn it off at the AC unit. Find Your Circuit Breaker Box. Reset the Circuit Breaker for Your AC Unit. Wait 30 Seconds. Turn the AC Thermostat Back On. What do I do when my Honeywell thermostat goes blank?Once you replace the batteries, you may need to reset the unit and reprogram your settings. 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.