What to Check First When Your Furnace Stops Heating

Power

Another common cause of inadequate heating or cold spots is power issues. Check the power supply to your furnace, whether you have an electric, a gas, or a hybrid system. A switch close to the unit may have been turned off or accidentally bumped into, cutting the power to the system. If this is not the problem, inspect the circuit breaker or the fuse. Replacing a blown fuse or resetting the breaker can restore functionality and comfort. However, recurring issues require the expertise of an HVAC service provider.

Thermostat

Your thermostat serves as the brain of your heating and cooling system. Inspect the settings on the panel to ensure it is “On,” and turned to “Auto” or “Heat” mode, and that the thermostat is set higher than the room temperature. The fan switch can be set to “Auto” or “On,” hence the need to raise the need to reach the highest temperature setting. This is a test to see if the furnace will come on, but if it fails, call a professional technician for heating repair services. Unlike DIY enthusiasts, professionals can pinpoint the root cause and recommend the best solution, even if it is a thermostat replacement, to ensure reliable performance throughout.

Reclose Door

If your unit was recently tuned up, this could be the cause of inadequate heating indoors. Check the safety switch located on the furnace door, as it prevents the burner and fan from running while the access panel is being repaired. With this in mind, closing the door properly can restore functionality and ensure the desired indoor temperature. If you reclose the furnace door and the problem persists, it suggests a bigger underlying problem. In such cases, call an HVAC company for an inspection to determine the root cause and the best course of action.

Pilot Light

Lastly, older furnace models have a pilot light that remains lit throughout, making it easy to light the furnace when you need heat. If the flame is blown out or you can’t keep it lit, then the problem is likely a broken or dirty sensor. This means there’s no way of telling if the flame is on, and the unit shuts the gas valve to prevent safety hazards. Newer models do not rely on a pilot light, but light automatically when you need heat.

If you have gone down this list and still have no heat, call Aire Serv to book an appointment with our trained and licensed technicians. We provide round-the-clock emergency furnace repair services, addressing your indoor comfort needs quickly and efficiently.