When your furnace is working correctly, it should give warm air without generating too much disruption. While it’s expected to notice your furnace making noise as it starts up, other sounds are showing your furnace requires immediate professional support.

Here are some of the most common furnace noises and what they can mean. If your furnace is making a weird noise, our friendly heating professionals are here to help with the best furnace repair in Phoenix, Arizona.

1. Furnace Makes Banging or Knocking Sounds

You may have a critical issue on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it may indicate there could be several problems. These include gas accumulating in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system gets dirty over time, so that’s why it’s important to set routine furnace maintenance with Dial One Mears Air Conditioning & Heating Inc. One of the jobs our pros complete during this appointment is clean your furnace’s burners. When this piece gets grimy, you might hear your furnace making a loud rumbling noise if ignition takes longer than normal. The following gas buildup can break your furnace’s heat exchanger, where natural gas changes into heat. Any cracks in it can emit carbon monoxide, which is regularly vented outside. This dangerous gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Dial One Mears Air Conditioning & Heating Inc advises turning it off and calling us at 602-789-3315. Too much natural gas in your furnace or a fractured heat exchanger are critical problems that should get prompt repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide heated air across your house. If the ductwork wasn’t installed properly or is getting dated, it can make a lot of noise when your furnace is heating. This can be the problem if your furnace makes a banging noise when it shuts off. Get in touch with Dial One Mears Air Conditioning & Heating Inc at 602-789-3315 and we’ll determine the problem.

2. Furnace Buzzes Constantly

If you observe your furnace making a buzzing noise, don’t wait to call us. A buzzing sound typically means there’s an electrical problem, 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 has a blower motor, which moves hot or chilly air throughout your home, and a capacitor, which triggers the motor. If either of these components are going out, they will buzz when the furnace starts.

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 critical, like a broken piece. In either case, we advise shutting your furnace off and calling our heating specialists at 602-789-3315 for assistance.

4. Furnace Making a Squealing Noise

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

5. Furnace Making a Whistling Noise

When you’re noticing your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You may also notice whistling while the furnace is working if a floor vent isn’t tight. If you’ve checked your vents but are still hearing sound, Dial One Mears Air Conditioning & Heating Inc can provide support. It’s critical to get loose ductwork taken care of without delay, since it can create comfort troubles in your house and increase your utility costs.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you hear your furnace making a grinding noise. This metal-on-metal racket often means there’s trouble with your furnace’s blower. Shut down your furnace off immediately and reach us at 602-789-3315 for help.

When you’re noticing a weird noise from your furnace, Dial One Mears Air Conditioning & Heating Inc is available to provide assistance. Contact us at 602-789-3315 to request your furnace repair appointment today.