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

When your furnace is operating like it should, it should provide warm air without generating too much disruption. While it’s common to hear your furnace making noise as it begins running, other sounds are indicating your furnace should get immediate professional support.

Here are some of the most reported furnace noises and what they can be indicating. If your furnace is making a strange noise, our friendly heating professionals are here to help with the best furnace repair in Wisconsin Rapids.

1. Furnace Making a Banging Noise

You may have an urgent issue on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it can indicate there could be a few problems. These involve gas accumulating in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system gets dirty as time passes, so that’s why it’s critical to book annual furnace maintenance with Rapids Sheet Metal Works Inc. One of the tasks our pros complete during this appointment is clean your furnace’s burners. When this part gets dirty, you could hear your furnace making a loud rumbling noise when ignition takes longer than normal. The following gas buildup can break your furnace’s heat exchanger, where natural gas transforms into warmth. Any cracks in it can leak carbon monoxide, which is regularly emitted away from your home. This dangerous gas can be fatal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Rapids Sheet Metal Works Inc recommends turning it off and reaching us at 715-301-0256. Significant natural gas in your furnace or a broken heat exchanger are serious problems that require immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide warm air across your house. If the ductwork wasn’t put in correctly or is getting dated, it can be loud when your furnace is heating. This might be the problem if your furnace makes a banging noise when it shuts off. Get in touch with Rapids Sheet Metal Works Inc at 715-301-0256 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

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

Your furnace uses an internal transformer to operate on the proper voltage. If wires or the box isn’t tight enough, you may hear a low humming noise in the furnace when off. Your furnace also has a blower motor, which sends warm or chilly air throughout your house, and a capacitor, which turns on the motor. If either of these pieces are failing, they will buzz when the furnace turns 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 piece. In either case, we recommend shutting off your furnace and calling our heating professionals at 715-301-0256 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s trying to alert you it requires some TLC. If you’ve skipped furnace maintenance the past few years, belts could be dilapidated or a bearing might need to be greased. We realize that maintenance sometimes slips your mind, but our professionals can get your furnace running quietly again rapidly.

5. Furnace Making a Whistling Noise

When you’re noticing your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You might also notice whistling while the furnace is on if a floor vent is loose. If you’ve checked your vents but are still hearing noise, Rapids Sheet Metal Works Inc can assist you. It’s important to get loose ductwork fixed without delay, since it can result in comfort issues in your residence and inflate your utility costs.

6. Furnace Making a Grinding Noise

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal racket frequently means there’s an issue with your furnace’s blower. Switch off your furnace off promptly and call us at 715-301-0256 for support.

When you’re hearing a strange noise from your furnace, Rapids Sheet Metal Works Inc is available to help. Contact us at 715-301-0256 to request your furnace repair appointment right away.

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