Before calling for service on your furnace, try these troubleshooting tips. If your furnace has been well maintained, you might be able to resolve some problems on your own. And doing so may be easier than you think!
Here are 8 simple things you can do to troubleshoot a broken furnace:
1. Ensure that the furnace power switch has been switched “On”.
Make sure the unit is connected and turned on. Occasionally cords can be inadvertently unplugged or loosened and switches can be accidentally urned off.
2. Make sure your furnace is getting power.
Check for tripped circuit breakers or blown fuses. If this is the case, have a licensed technician inspect your system to determine and correct the cause.
3. Make sure nothing is blocking the fresh air intake and the exhaust.
If the fresh air intake and exhaust run through the side of your home rather than through a chimney, debris could be causing a block. Make sure the area remains clean and clear. Moisture may also contribute to the problem. Talk to your HVAC technician about venting options to resolve the problem.
4. Check your thermostat settings.
Thermostat settings can also become changed inadvertently. The thermostat should be set to “heat” and at a high enough temperature for the furnace to turn on.
5. Check your thermostat’s batteries.
Check to see if the low battery light (usually on programmable thermostats) has come on and replace the batteries as needed.
6. Check your furnace filter.
If the furnace filter hasn’t been replaced in awhile, it could be clogged and causing your furnace to malfunction. Replace the filter every 30 to 60 days.
7. Check the pilot light.
Older furnaces have pilot lights. If the flame is out, check the owner’s manual for instructions to re-light it.
8. Check the gas valve.
Make sure the gas valve is turned on. Check other gas appliances in your home to see if the problem is with the gas line.
If your furnace doesn’t start after going through the checklist, you will need to call a licensed technician to inspect your furnace.
Keep your furnace efficient and reliable throughout the colder months with an annual professional inspection. Indoor Air Quality is here to assist with all your HVAC needs. Contact us today! We serve homes in Highlands Ranch and throughout the Denver Metro Area.