Ensure your furnace filters are clean: Your furnace won’t start up if it does not get enough airflow. A dirty air filter can prevent airflow and prevent your furnace from starting up. Check your pilot light: If you have a gas furnace and gas supply is stopped your pilot light will go out.
What would cause a furnace not to kick on?
If your furnace is not turning on you should first check if the filter is clean. Dirty filters cause insufficient airflow and can prevent the furnace from starting. Other reasons it won’t start can stem from improper thermostat settings, forgetting to turn on the gas line, or faulty pilot light.
Why is my furnace not responding to thermostat?
When a furnace is not responding to a thermostat, there is either a problem with the heating unit or the actual thermostat. Lack of power to the thermostat, wrong settings, and outdated software might be to blame, as well as faulty wiring, a tripped breaker, and a dirty furnace filter.
