Furnace Not Working? Try These Simple Steps Before Calling a Pro
A furnace issue can be frustrating—especially during colder months. Before you call an HVAC company, there are a few quick checks you can try that may save you time, money, and stress.
Step-by-Step Troubleshooting Guide
1. Turn the thermostat to “Off.”
Start with a full reset.
2. Replace the thermostat batteries.
If your thermostat uses batteries, weak or dead batteries can stop your system from working.
3. Check the furnace filter.
A dirty or clogged filter can restrict airflow and cause the furnace to shut down.
4. Turn off the furnace power switch.
Locate the switch near the furnace and turn it off for about 10 minutes.
5. Check the outside exhaust vent.
Make sure it’s not blocked by snow, ice, or debris (this is a common issue).
6. Turn the furnace power back on.
7. Reset the thermostat.
Switch the thermostat back to “Heat” and raise the temperature about 7 degrees above the current indoor temperature.
8. Check the flame sensor.
A dirty flame sensor can prevent the furnace from running.
Still Not Working?
Look for a blinking error code through the furnace’s viewing window (usually on the front of the unit). You can search the furnace’s make and model online to find out what the code means and whether it’s something simple or requires professional service.
A little troubleshooting can go a long way—and knowing these basics is a great tip for homeowners and buyers alike. Hopefully, this helps you avoid unnecessary service calls and keeps your home warm and comfortable!