Furnace Not Working? Our No-Heat Checklist Can Help Fix That
What Can Cause a Furnace to Stop Working?
Causes can range from dead batteries in your thermostat all the way to a broken fan belt. If your furnace won’t turn on or isn’t circulating enough heat, try the following steps to get it working again.
Start With Your Thermostat
Sometimes a simple thermostat issue can cause your furnace to stop working. Make sure your device is set to heating mode. If it is, turn up the temperature a few degrees to see if your heating system can keep up.
Next, make sure the fan is set to “on” instead of “auto”—this means the fan runs constantly, which will help spread warm air throughout your house.
Lastly, try replacing your thermostat’s batteries. As simple as it sounds, sometimes your furnace won’t kick on because the thermostat has no power.
Check Your Air Filter
Air filters trap dirt, dust, and other airborne contaminants as they circulate through your vents, creating cleaner indoor air. However, as they do, they get dirty and clogged. This can prevent warm air from flowing through your ducts, causing furnace problems and making you uncomfortable. Replace your air filter to ensure it’s clean and clear, then test your heating system again to see if this improved airflow.
Open All Vents and Return Ducts
You might think that closing vents in rooms you don’t use can help you save money by redirecting air to other areas. But this isn’t true—your furnace is sized during installation to heat your entire home. When you close vents or block ducts, it puts more stress on your heating system to reach those closed-off areas. Go around the house and make sure all vents are open and unblocked to improve circulation (and help prevent unnecessary system breakdowns).
Inspect the Circuit Breaker
If your furnace will not turn on at all, it’s possible your breakers have tripped. Head to your breaker box to make sure all breakers are in the “on” position. If not, flip them on and go back to your thermostat to test furnace operation.
When to Call for Expert Furnace Repair
If you’ve tried all these steps and you still have no heat, it’s time to call the experts at Interstate Heating. However, if you notice any of these signs at any point, you should call our pros ASAP:
- Your furnace is leaking
- You hear strange noises, like rattling or banging, when the system runs
- The furnace runs nonstop
As a Carrier® Factory Authorized Dealer, we have the experience and know-how to fix a furnace, no matter the problem. We’ll provide honest feedback, recommendations, and diagnosis—all as quickly and efficiently as possible. Call us today at 262-246-4772 or contact us online.