Sometimes the thermostat gets turned off or the setting changed by accident.
Carrier gas furnace ignition problem.
A bad blower dirty filter collapsed ductwork plugged up flue can cause the limit switches to open.
This can easily be overlooked.
Gas and oil home heating furnaces carrier 58gsc065 jb gas furnace spark ignition problem i have a carrier furnace that does not reach temp or heat up at all sometimes had the gas co.
Check the air filter.
Your furnace has built in fail safes to keep you and your house safe when there is a problem with the system.
All problems resolved before the furnace is returned to operation.
All the gas furnace problems need to check out with proper troubleshooting techniques.
Also clean any dirty air filters before trying to reset the igniter.
The truth is many homeowners have thought their carrier furnace wasn t working but all they needed to do was to turn on the system or turn up the heat.
If it s dirty air can t flow properly through the furnace.
The problem is not the switch.
Carrier gas furnace troubleshooting step by step.
Flame sensor electronic ignition gas furnace problems and troubleshooting.
The switch is doing it s job by shutting the gas thus heat off.
Look for common problems check to see that the circuit breaker for the furnace is not tripped and provides power to the unit.