When your furnace is working correctly, it should give warmth without making too much sound. While it’s normal to catch your furnace making noise as it starts up, other noises are signaling your furnace needs immediate professional help.

Here are some of the most reported furnace noises and what they could mean. If your furnace is making an atypical noise, our friendly heating professionals are here to assist with the best furnace repair in Rockford, Illinois.

1. Furnace Making a Banging Noise

You could have an urgent problem on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it might signal there could be a few problems. These include gas building up in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system becomes grimy over time, so that’s why it’s essential to schedule yearly furnace maintenance with Temperature Doctors Heating & Cooling. One of the jobs our pros do during this work is clean your furnace’s burners. When this part gets dirty, you could hear your furnace making a loud rumbling noise when ignition is delayed. The resulting gas buildup might crack your furnace’s heat exchanger, where natural gas transforms into warmth. Any cracks in it can emit carbon monoxide, which is ordinarily vented away from your home. This dangerous gas can be deadly in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Temperature Doctors Heating & Cooling urges you to turn it off and reaching us at (815) 914-6197. Too much natural gas in your furnace or a ruptured heat exchanger are dangerous troubles that require prompt service.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide hot air across your house. If the ductwork wasn’t designed right or is getting old, it can be noisy when your furnace runs. This can be the problem if your furnace makes a banging noise when it shuts off. Call Temperature Doctors Heating & Cooling at (815) 914-6197 and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

If you notice your furnace making a buzzing noise, don’t delay calling us. A buzzing sound often indicates an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace uses an internal transformer to work on the correct voltage. If wires or the box needs to be tightened, you might hear a low humming noise in the furnace when off. Your furnace also works with a blower motor, which sends heated or cooled air throughout your rooms, and a capacitor, which turns on the motor. If either of these parts are failing, they will buzz when the furnace switches on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it could be due to something small, like a loose screw, or something critical, like a broken part. In either case, we urge you to shut your furnace off and calling our heating pros at (815) 914-6197 for assistance.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s making an effort to tell you it requires some TLC. If you’ve skipped furnace maintenance the past few years, belts could be worn down or a bearing might need to be lubed. We know that maintenance often slips your mind, but our professionals can get your furnace running quietly again quickly.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s frequently the result of an air leak in your ductwork. You could also hear whistling while the furnace is running if a floor vent isn’t tight. If you’ve examined your vents but are still noticing whistling, Temperature Doctors Heating & Cooling can help. It’s essential to get loose ductwork repaired quickly, because it can create comfort issues in your house and increase your energy costs.

6. Furnace Making a Grinding Noise

It’s not a good sign if you hear your furnace making a grinding noise. This metal-on-metal racket usually means there’s trouble with your furnace’s blower. Switch off your furnace off now and call our professionals at (815) 914-6197 for assistance.

When you’re hearing an atypical noise from your furnace, Temperature Doctors Heating & Cooling is ready to support you. Contact us at (815) 914-6197 to request your furnace repair appointment right away.