Is the thermostat set to heat?
Sometimes we are so busy with our daily lives that we often forget to crank up the thermostat in heating mode. Consequently it is set down in cooling mode, the house is not being heated, and you panic for a technician to come to your assistance. The solution is quite simple, jut set it at higher temperature. If this does not solve it then check the batteries of the thermostat. Change them if they have run out. Sometimes there could be a loose connection at the terminals. Check and tighten them. Make sure that your thermostat is not guarded by any other object which is preventing it to sample the room air.
Is the power is reaching the furnace?
If the thermostat screen is completely black, check the main switch of the furnace. See if it is pulled up in ‘on’ position. If it was off, turn it on. Wait for some time to allow it heat the house.
Are the filters clean?
Dirty filter can be wreaking havoc on the performance of the furnace. Bunged filter restricts the flow of air which reduces the output of the gadget. They can also be a breeding ground for bacteria and cause you and your loved ones to become sick. Change your filter to keep both your furnace and your family healthy.
Is the circuit breaker off?
If the furnace is not working at all, you should also check the circuit breaker. It is the breaker that controls the furnace. Check if it is ‘off’ or in middle position. If it is in middle position, turn it off and then again move it to ‘on’ position.
Are burners and valves working well?
If you have a gas furnace, check if the valve is opening to allow the fuel to reach the burner. In case they aren’t, they need to be repaired or replaced. Check the burner for misalignment. Burners could also get clogged with dirt and debris that will prevent them from working. You can clean them with a brush and soap water.