When your furnace is running correctly, it should give heat without creating too much sound. While it’s expected to catch your furnace making noise as it turns on, other sounds are showing your furnace should get immediate professional assistance.

Here are some of the most frequent furnace noises and what they might be signaling. If your furnace is making a strange noise, our friendly heating professionals are here to assist with the best furnace repair in Cottonwood & Prescott, Arizona.

1. Furnace Makes Banging or Knocking Sounds

You may 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 may indicate there could be a few problems. These range from gas building up in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system becomes dirty over the years, so that’s why it’s important to set annual furnace maintenance with Connolly Electric & Mechanical. One of the tasks our pros perform during this service is clean your furnace’s burners. When this component gets grubby, you may 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 emit carbon monoxide, which is ordinarily released outside. This dangerous gas can be lethal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Connolly Electric & Mechanical urges you to turn it off and reaching us at 928-251-4327. Too much natural gas in your furnace or a fractured heat exchanger are dangerous problems that require prompt attention.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to move warm air across your residence. If the ductwork wasn’t put in properly or is getting old, it can make a lot of noise when your furnace is heating. This might be the problem if your furnace makes a banging noise when it shuts off. Contact Connolly Electric & Mechanical at 928-251-4327 and we’ll determine the problem.

2. Furnace Makes a Buzzing Sound

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

Your furnace uses an internal transformer to operate on the correct voltage. If wires or the box is loose, you could notice a low humming noise in the furnace when off. Your furnace also works with a blower motor, which distributes warm or cold air across your space, and a capacitor, which starts 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 minor, like an unfastened screw, or something serious, like a broken component. In either case, we advise shutting your furnace off and calling our heating pros at 928-251-4327 for help.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s trying to tell you it requires some TLC. If you’ve forgotten furnace maintenance the last couple of years, belts could be worn down or a bearing may need to be lubed. We realize that maintenance often slips your mind, but our pros can get your furnace heating quietly again rapidly.

5. Furnace Whistles

When you’re hearing your furnace making a whistling noise, it’s likely due to an air leak in your ductwork. You might also be aware of whistling while the furnace is running if a floor vent is loose. If you’ve examined your vents but are still hearing whistling, Connolly Electric & Mechanical can provide support. It’s essential to get loose ductwork taken care of quickly, since it can make comfort troubles in your home and increase your utility bills.

6. Furnace Making a Grinding Noise

It’s not a good sign if you notice your furnace making a grinding noise. This metal-on-metal noise often means there’s trouble with your furnace’s blower. Turn off your furnace off now and contact our professionals at 928-251-4327 for support.

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