Banging, Screeching and Rattling: What 6 Typical Furnace Noises Mean

October 13, 2020

When your furnace is running properly, it should deliver heat without creating too much disruption. While it’s expected to catch your furnace making noise as it turns on, other sounds are showing your furnace should get immediate professional support.

Here are some of the most common furnace noises and what they might be indicating. If your furnace is making a strange noise, our friendly heating professionals are here to assist with the best furnace repair in Grand Prairie, TX.

1. Furnace Making a Banging Noise

You may have a critical problem on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it may mean there could be a few problems. These involve gas building up in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system becomes dirty as time passes, so that’s why it’s essential to schedule annual furnace maintenance with Bon Air Service Company. One of the things our professionals perform during this service is clean your furnace’s burners. When this piece gets grubby, you could hear your furnace making a loud rumbling noise if ignition takes more time. The following gas buildup may fracture your furnace’s heat exchanger, where natural gas turns into heat. Any fractures in it can emit carbon monoxide, which is ordinarily released away from your home. This toxic gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Bon Air Service Company recommends turning it off and reaching us at 972-332-1028. Significant natural gas in your furnace or a broken heat exchanger are hazardous issues that require prompt service.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide warm air across your residence. If the ductwork wasn’t designed right or is aging, it can be noisy when your furnace is on. This may be the issue if your furnace makes a banging noise when it shuts off. Call Bon Air Service Company at 972-332-1028 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

If you observe your furnace making a buzzing noise, don’t delay calling us. A buzzing sound frequently is telling you there’s an electrical problem, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to work on the proper voltage. If wires or the box is loose, you could detect a low humming noise in the furnace when off. Your furnace also uses a blower motor, which distributes warm or chilly air across your residence, and a capacitor, which starts the motor. If either of these components are failing, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it might be the result of something little, like an unsecure screw, or something critical, like a broken piece. In either case, we recommend shutting off your furnace and calling our heating specialists at 972-332-1028 for assistance.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s making an effort to get your attention it needs some TLC. If you’ve neglected furnace maintenance the past few years, belts could be worn out or a bearing may need to be lubricated. We are aware that maintenance sometimes slips your mind, but our pros can get your furnace operating quietly again fast.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s frequently the result of an air leak in your ductwork. You may also be aware of whistling while the furnace is working if a floor vent is loose. If you’ve looked at your vents but are still sensing sound, Bon Air Service Company can help. It’s essential to get loose ductwork taken care of quickly, since it can result in comfort problems in your residence and drive up your energy expenses.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you notice your furnace making a grinding noise. This metal-on-metal noise often means there’s trouble with your furnace’s blower. Turn off your furnace off immediately and contact our pros at 972-332-1028 for support.

When you’re getting a weird noise from your furnace, Bon Air Service Company is ready to support you. Contact us at 972-332-1028 to request your furnace repair appointment right away.