To fix the aux heat on your thermostat, you can try resetting the thermostat, checking the wiring connections, and ensuring that the auxiliary heat source is functioning properly. If these steps do not resolve the issue, it may be best to contact a professional HVAC technician for further assistance.
check the thermostat
change the thermostat
You need to check your thermostat, pretty cheap fix
If your heat won't turn off, it could be due to a faulty thermostat or a problem with the heating system itself. To fix this issue, you can try adjusting the thermostat settings, checking for any blockages in the vents, or contacting a professional HVAC technician for further assistance.
Try gently tapping in. It is best to just replace it. Its cheap and ez to do
on my honeywell gas furnace says aux heat is on when heat is on
A heat pump thermostat.
There is either a problem with the downstairs thermostat, or the wiring from that thermostat to the unit. First check the batteries in the thermostat. Yes the digital ones have batteries. :-) Next, if that doesn;t fix it, try switching your two thermostats. Be careful to wire them exactly as they were before. If your heat now works downstairs and not upstairs, replace the thermostat. If the problem remains unchanged and you still have heat up and not down - check your thermostat wiring. The voltage is low so a simple voltmeter can be used to confirm continuity from the end where it goes into the furnace to the end where it connects to the thermostat. If the wire checks out and the problem is not the thermostat, then call a licnesed professinal - youhave bigger problems.
There could be several reasons for no heat when the thermostat is turned on, such as a faulty thermostat, a malfunctioning heater or furnace, a blown fuse or tripped circuit breaker, or a lack of fuel or gas supply to the heating system. It is best to consult a professional HVAC technician to identify and fix the issue.
Replace the thermostat gasket.
Usually a thermostat will fix it, could be low coolant, heater control, wrong thermostat (should be a 195 degree) or restriction in the heater core or cooling system also.
In a hot water heater, a thermostat regulates the heat