Gas Furnace Thermostat Blank

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Gas furnace thermostat blank.

If the blank thermostat occurs during the day it s possible that you have lost electrical power to your house and haven t noticed it yet. The power loss could also be the result of a tripped circuit breaker that powers the air conditioner or heater. Power stealing thermostats get their power from the transformer. If your thermostat screen has gone blank and your thermostat runs on batteries the first thing you should try is replacing the batteries with a fresh set.

Most thermostats display a low battery symbol when the juice is running low. The issue could simply be a broken thermostat. In rare cases the transformer could be located in the condensing unit. Honeywell and other brands of programmable thermostats typically show a blank screen when there is no power going to the wall unit.

On the other hand if your thermostat is hardwired to your hvac system for power it could be a temporary blank screen if the thermostat is in the middle of recharging. Most modern thermostats are powered by the transformer in your air handler or furnace. 1 16 of 687 results for gas furnace thermostat emerson 1e78 140 non programmable heat only thermostat for single stage systems. Get it as soon as fri oct 9.

The possible reason your thermostat screen can go blank is a loss of power to the furnace. For a gas furnace the trouble might be the limit switch. Most furnaces have a high limit switch that prevents the system from overheating. Wait a short time and see if the display returns.

Free shipping by amazon. How to change the batteries in your thermostat will depend on its make and model but most thermostats have a removable battery compartment that is easily accessible. A technician can advise you on whether to fix the unit or replace it with an updated thermostat model. The batteries in your thermostat can last as long as five years or as little as a few months so if your thermostat is turned on but still blank try swapping out the batteries.

4 5 out of 5 stars 985. More buying choices 7 27 28 used new offers. The safety switch was triggered in some homes an air conditioner or furnace can trigger a safety switch and turn off the thermostat entirely if any damage has been detected.