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Banging, Screeching and Rattling: What 6 Ordinary Furnace Noises Signify

October 13, 2020

When your furnace is working properly, it should give warm air without making too much noise. While it’s expected to hear your furnace making noise as it starts up, other disruptions are indicating your furnace should get immediate professional help.

Here are some of the most common furnace noises and what they could mean. If your furnace is making a strange noise, our friendly heating pros are here to fix the problem with the best furnace repair in Plainfield.

1. Furnace Making a Banging Noise

You might have a critical problem on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it can indicate there could be a few problems. These include gas increasing in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system gets filthy over time, so that’s why it’s important to set routine furnace maintenance with PWA Heating & Cooling Inc. One of the things our professionals complete during this service is clean your furnace’s burners. When this piece gets dirty, you might hear your furnace making a loud rumbling noise after ignition takes longer than normal. The resulting gas buildup can crack your furnace’s heat exchanger, where natural gas changes into warmth. Any fractures in it can emit carbon monoxide, which is normally emitted outdoors. This hazardous gas can be fatal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, PWA Heating & Cooling Inc urges you to turn it off and calling us at 815-410-1231. Too much natural gas in your furnace or a fractured heat exchanger are critical troubles that require prompt service.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to move hot air around your home. If the ductwork wasn’t designed properly or is aging, it can be noisy when your furnace runs. This can be the issue if your furnace makes a banging noise when it shuts off. Get in touch with PWA Heating & Cooling Inc at 815-410-1231 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

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

Your furnace depends on an internal transformer to run on the right voltage. If wires or the box isn’t tight enough, you might notice a low humming noise in the furnace when off. Your furnace also has a blower motor, which moves heated or chilly air around your rooms, and a capacitor, which triggers the motor. If either of these parts are going out, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it may be related to something small, like an unsecure screw, or something major, like a broken component. In either case, we advise shutting your furnace off and contacting our heating professionals at 815-410-1231 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s trying to get your attention it requires some TLC. If you’ve forgotten furnace maintenance recently, belts could be worn out or a bearing might need to be lubed. We are aware that maintenance often slips your mind, but our technicians can get your furnace heating quietly again quickly.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You may also be aware of whistling while the furnace is working if a floor vent isn’t tight. If you’ve examined your vents but are still noticing whistling, PWA Heating & Cooling Inc can assist you. It’s important to get loose ductwork taken care of quickly, because it can create comfort troubles in your residence and increase your heating costs.

6. Furnace Making a Grinding Noise

It’s not a positive sign if you hear your furnace making a grinding noise. This metal-on-metal racket typically means there’s a problem with your furnace’s blower. Switch off your furnace off immediately and call us at 815-410-1231 for support.

When you’re hearing a weird noise from your furnace, PWA Heating & Cooling Inc is here to support you. Contact us at 815-410-1231 to book your furnace repair appointment today.