Had a new american standard furnace put in dec.
Wall furnace thermostat not working.
On the backside of the thermostat directly behind the mercury switch and coil on the front you ll find a small metal nib some models have a slot for a screwdriver.
When your thermostat says one temperature and you know the room is another it may be dirty tilted on the wall or located where it can t get a proper reading.
12th with what was supposed to be a new thermostat.
Thermostat does not control temperature.
2 remove the thermostat s cover.
Using a regular thermometer as a guide adjust the thermostat s thermometer.
The thermostat controls both the heating and cooling systems of homes with central heat and air conditioning or just the furnace in homes without air.
1 turn the power off to the heating system.
How to tell if your home thermostat is bad.
To adjust the thermometer remove the thermostat from the wall.
I have a lot of dust try running it on run only but it will not work on anything but auto.
That is okay if it would work right.
If your heater isn t working but you can see a steady blue pilot flame the thermostat may not be signaling the heater to come on.