When your furnace is operating correctly, it should deliver heat without creating too much noise. While it’s normal to notice your furnace making noise as it starts up, other sounds are signaling your furnace needs immediate professional assistance.

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

1. Furnace Makes a Banging Sound

You may have a serious problem on your hands if you’re detecting 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 increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system gets dirty over the years, so that’s why it’s critical to book yearly furnace maintenance with Rapids Sheet Metal Works Inc. One of the tasks our techs complete during this work is clean your furnace’s burners. When this piece gets grubby, you might hear your furnace making a loud rumbling noise if ignition takes longer than normal. The resulting gas buildup may crack your furnace’s heat exchanger, where natural gas transforms into heat. Any breaks in it can discharge carbon monoxide, which is ordinarily released outside. This dangerous gas can be deadly in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Rapids Sheet Metal Works Inc recommends turning it off and reaching us at 715-301-0256. Excessive natural gas in your furnace or a cracked heat exchanger are hazardous problems that should get immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide warm air throughout your home. If the ductwork wasn’t designed correctly or is getting old, it can be noisy when your furnace is heating. This could be the issue if your furnace makes a banging noise when it shuts off. Call Rapids Sheet Metal Works Inc at 715-301-0256 and we’ll pinpoint the problem.

2. Furnace Buzzes Constantly

If you observe your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound often indicates an electrical problem, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to operate on the proper voltage. If wires or the box needs to be tightened, you could notice a low humming noise in the furnace when off. Your furnace also uses a blower motor, which moves warm or chilly air throughout your space, and a capacitor, which triggers the motor. If either of these pieces are going out, they will buzz when the furnace switches on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it can be related to something little, like an unfastened screw, or something critical, like a broken component. In either case, we advise shutting your furnace off and contacting our heating specialists at 715-301-0256 for help.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s attempting to tell you it could use some TLC. If you’ve skipped furnace maintenance the past few years, belts could be worn out or a bearing might need to be lubricated. We are aware that maintenance often slips your mind, but our techs can get your furnace operating quietly again fast.

5. Furnace Whistles

When you’re noticing your furnace making a whistling noise, it’s likely due to an air leak in your ductwork. You may also notice whistling while the furnace is on if a floor vent isn’t secure. If you’ve checked your vents but are still noticing sound, Rapids Sheet Metal Works Inc can assist you. It’s essential to get loose ductwork fixed without delay, as it can result in comfort troubles in your house and drive up your energy expenses.

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 an issue with your furnace’s blower. Turn off your furnace off immediately and contact us at 715-301-0256 for assistance.

When you’re getting a strange noise from your furnace, Rapids Sheet Metal Works Inc is here to provide assistance. Contact us at 715-301-0256 to schedule your furnace repair appointment right away.