When your furnace is operating correctly, it should give warmth without creating too much sound. While it’s normal to catch your furnace making noise as it begins running, other disruptions are signaling 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 a weird noise, our friendly heating pros are here to help with the best furnace repair in Cottonwood & Prescott, Arizona.

1. Furnace Making a Banging Noise

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

Banging Sounds Coming from Your Furnace

Your heating system turns filthy over the years, so that’s why it’s critical to schedule routine furnace maintenance with Connolly Electric & Mechanical. One of the things our pros do during this work is clean your furnace’s burners. When this piece gets grubby, you could hear your furnace making a loud rumbling noise after ignition takes longer than normal. The resulting gas buildup might break your furnace’s heat exchanger, where natural gas turns into heat. Any cracks in it can discharge carbon monoxide, which is normally emitted outdoors. This toxic gas can be fatal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Connolly Electric & Mechanical urges you to turn it off and contacting us at 928-251-4327. Too much natural gas in your furnace or a broken heat exchanger are critical problems that should get immediate attention.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide hot air across your house. If the ductwork wasn’t installed right or is getting old, it can be noisy when your furnace is heating. This can be the case if your furnace makes a banging noise when it shuts off. Get in touch with Connolly Electric & Mechanical at 928-251-4327 and we’ll figure out 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 frequently means there’s an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace uses an internal transformer to work on the right voltage. If wires or the box is loose, you might hear a low humming noise in the furnace when off. Your furnace also works with a blower motor, which distributes heated or cold air around your space, and a capacitor, which triggers the motor. If either of these components are fading, they will buzz when the furnace starts.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it may be due to something little, like a loose screw, or something major, like a broken component. In either case, we recommend shutting off your furnace and contacting our heating specialists at 928-251-4327 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s attempting to tell you it requires some TLC. If you’ve neglected furnace maintenance the past few years, belts could be worn out or a bearing could 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 Whistles

When you’re hearing your furnace making a whistling noise, it’s typically the result of an air leak in your ductwork. You might also notice whistling while the furnace is running if a floor vent isn’t tight. If you’ve checked your vents but are still hearing noise, Connolly Electric & Mechanical can help. It’s essential to get loose ductwork fixed fast, as it can result in comfort troubles in your residence and increase your gas costs.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a positive sign if you detect 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 right away and contact our professionals at 928-251-4327 for assistance.

When you’re getting an atypical noise from your furnace, Connolly Electric & Mechanical is available to help. Contact us at 928-251-4327 to schedule your furnace repair appointment now.