Home General What To Check When Your Furnace Stops Working

What To Check When Your Furnace Stops Working

Mobile Home Furnace Brand Names
Mobile Home Furnace Brand Names from nyenet.com


Dealing with a malfunctioning furnace can be a frustrating experience, especially during the chilly winter months. Before you call a professional technician, it’s worth taking a few minutes to troubleshoot the problem yourself. In this article, we will guide you through the key things to check when your furnace stops working, helping you save time and money.

1. Power Supply

Start by ensuring that your furnace is receiving power. Check if the circuit breaker or fuse connected to the furnace is tripped or blown. If so, reset the breaker or replace the fuse. Additionally, make sure that the furnace’s power switch is turned on.

2. Thermostat Settings

Check your thermostat settings to ensure they are correctly set. Make sure the thermostat is set to “heat” mode and set the temperature higher than the current room temperature to activate the furnace.

3. Air Filter

A clogged air filter can cause your furnace to stop working. Remove the filter and inspect it for dirt and debris. If it appears dirty, replace it with a new one. Regularly changing your air filter can also improve the efficiency and lifespan of your furnace.

4. Gas Supply

If you have a gas furnace, ensure that the gas supply valve is fully open. If the valve is partially closed, the furnace may not receive enough gas to ignite. If you suspect a gas leak, immediately turn off the gas supply and contact a professional technician.

5. Pilot Light

If your furnace has a pilot light, inspect it to see if the flame is lit. If the flame is out, follow the manufacturer’s instructions to relight it. If the pilot light continues to go out, it may indicate a more significant issue that requires professional assistance.

6. Circuit Board

Check the furnace’s circuit board for any visible signs of damage, such as burnt wires or loose connections. If you notice any issues, it’s best to contact a professional technician to handle the repairs.

7. Ignition System

If your furnace has an electronic ignition system, check if it’s functioning correctly. Listen for a clicking sound, indicating that the system is attempting to ignite the burners. If you don’t hear any clicking, there may be a problem with the ignition system that requires professional attention.

8. Blower Motor

Inspect the blower motor to see if it’s running. If it’s not, check if the motor is receiving power. If there is power, but the motor is still not running, it may be a sign of a faulty motor that needs replacement.

9. Ductwork

Examine the ductwork for any blockages or leaks. Obstructions can prevent warm air from reaching your living spaces, while leaks can cause a loss of efficiency. Seal any leaks using duct tape or contact a professional technician to address larger issues.

10. Professional Assistance

If you have gone through the above steps and your furnace is still not working, it’s time to seek professional help. Contact a licensed HVAC technician who can diagnose and repair any complex issues with your furnace.


By checking these key components yourself, you may be able to identify and resolve the issue causing your furnace to stop working. However, always prioritize your safety and contact a professional technician if you are unsure or uncomfortable with any troubleshooting steps.