When your furnace is running like it should, it should provide warmth without making too much sound. While it’s expected to catch your furnace making noise as it begins running, other noises are signaling your furnace needs immediate professional help.

Here are some of the most common furnace noises and what they can be signaling. If your furnace is making a weird noise, our friendly heating professionals are here to fix the problem with the best furnace repair in Waunakee, Wisconsin.

1. Furnace Makes a Banging Sound

You could have an urgent situation on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it may signal there could be several problems. These include gas building up in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system gets dirty as time passes, so that’s why it’s essential to book seasonal furnace maintenance with Home Comfort Heating & Air Conditioning LLC. One of the jobs our technicians complete during this appointment is clean your furnace’s burners. When this part gets grubby, you might hear your furnace making a loud rumbling noise after ignition takes more time. The resulting gas buildup may fracture your furnace’s heat exchanger, where natural gas turns into warmth. Any cracks in it can emit carbon monoxide, which is normally vented outside. This dangerous gas can be fatal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Home Comfort Heating & Air Conditioning LLC urges you to turn it off and contacting us at 608-850-9498. Excessive natural gas in your furnace or a cracked heat exchanger are dangerous issues that require prompt attention.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to deliver hot air throughout your home. If the ductwork wasn’t installed properly or is getting dated, it can be noisy when your furnace is heating. This can be the problem if your furnace makes a banging noise when it shuts off. Call Home Comfort Heating & Air Conditioning LLC at 608-850-9498 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

If you hear your furnace making a buzzing noise, don’t wait to call us. A buzzing sound frequently indicates an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace uses an internal transformer to run on the proper 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 uses a blower motor, which distributes heated or cold air throughout your residence, and a capacitor, which triggers the motor. If either of these pieces are going out, they will buzz when the furnace turns on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it may be due to something little, like an unfastened screw, or something major, like a broken component. In either case, we advise shutting your furnace off and contacting our heating specialists at 608-850-9498 for support.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s attempting to get your attention it requires some TLC. If you’ve forgotten furnace maintenance the past few years, belts could be worn down or a bearing might need to be lubricated. We know that maintenance frequently slips your mind, but our technicians can get your furnace heating quietly again quickly.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re noticing your furnace making a whistling noise, it’s typically because of an air leak in your ductwork. You could also be aware of whistling while the furnace is on if a floor vent is loose. If you’ve examined your vents but are still hearing sound, Home Comfort Heating & Air Conditioning LLC can provide support. It’s essential to get loose ductwork taken care of without delay, because it can result in comfort troubles in your house and inflate your heating costs.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not an encouraging sign if you notice your furnace making a grinding noise. This metal-on-metal racket usually means there’s a problem with your furnace’s blower. Turn off your furnace off right away and call us at 608-850-9498 for support.

When you’re noticing a weird noise from your furnace, Home Comfort Heating & Air Conditioning LLC is ready to support you. Contact us at 608-850-9498 to book your furnace repair appointment today.