When your furnace is running correctly, it should deliver warmth without generating too much disruption. While it’s expected to catch your furnace making noise as it begins running, other disruptions are showing your furnace requires immediate professional support.

Here are some of the most common furnace noises and what they might be indicating. If your furnace is making an odd noise, our friendly heating professionals are here to assist with the best furnace repair in Tucson and Phoenix, Arizona.

1. Furnace Makes a Banging Sound

You may have an urgent problem 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 a couple of problems. These involve gas building up 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 essential to set annual furnace maintenance with Desert Husky HVAC/R Services. One of the things our techs perform during this work is clean your furnace’s burners. When this piece gets grimy, you might hear your furnace making a loud rumbling noise after ignition takes more time. The subsequent gas buildup may crack your furnace’s heat exchanger, where natural gas turns into warm air. Any cracks in it can discharge carbon monoxide, which is ordinarily vented outside. This hazardous gas can be deadly in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Desert Husky HVAC/R Services recommends turning it off and calling us at 520-416-5415. Too much natural gas in your furnace or a broken heat exchanger are hazardous troubles that necessitate prompt service.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to provide heated air around your home. If the ductwork wasn’t put in correctly or is getting old, it can make a lot of noise when your furnace is on. This might be the issue if your furnace makes a banging noise when it shuts off. Call Desert Husky HVAC/R Services at 520-416-5415 and we’ll determine the problem.

2. Furnace Makes a Buzzing Sound

If you notice 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 needs to be tightened, you could notice a low humming noise in the furnace when off. Your furnace also uses a blower motor, which distributes warm or cold air around your home, and a capacitor, which triggers the motor. If either of these components are fading, they will buzz when the furnace switches on.

3. Furnace Rattles

If your furnace is making a rattling noise, it can be the result of something small, like a loose screw, or something critical, like a broken piece. In either case, we advise shutting your furnace off and getting in touch with our heating specialists at 520-416-5415 for assistance.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s trying to alert you it requires some TLC. If you’ve neglected furnace maintenance the last couple of years, belts could be worn down or a bearing could need to be lubed. We are aware that maintenance sometimes slips your mind, but our technicians can get your furnace running quietly again rapidly.

5. Furnace Whistles

When you’re detecting your furnace making a whistling noise, it’s frequently because of an air leak in your ductwork. You may also hear whistling while the furnace is on if a floor vent isn’t secure. If you’ve checked your vents but are still noticing sound, Desert Husky HVAC/R Services can provide support. It’s critical to get loose ductwork fixed without delay, as it can create comfort troubles in your house and drive up your heating bills.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal sound typically means there’s an issue with your furnace’s blower. Shut down your furnace off promptly and reach our professionals at 520-416-5415 for support.

When you’re getting a weird noise from your furnace, Desert Husky HVAC/R Services is here to provide assistance. Contact us at 520-416-5415 to book your furnace repair appointment today.