When your furnace is operating like it should, it should deliver heat without generating too much disruption. While it’s normal to hear your furnace making noise as it begins running, other sounds are signaling your furnace needs immediate professional support.

Here are some of the most frequent furnace noises and what they can be indicating. If your furnace is making an atypical noise, our friendly heating specialists are here to assist with the best furnace repair in Los Angeles, California.

1. Furnace Makes Banging or Knocking Sounds

You may have a critical 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 couple of problems. These range from gas accumulating 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 essential to set seasonal furnace maintenance with AZ Air Conditioning and Heating. One of the jobs our techs do during this service is clean your furnace’s burners. When this component gets grimy, you may hear your furnace making a loud rumbling noise after ignition is delayed. The subsequent gas buildup can crack your furnace’s heat exchanger, where natural gas changes into warmth. Any fractures in it can discharge carbon monoxide, which is regularly emitted outside. This hazardous gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, AZ Air Conditioning and Heating recommends turning it off and calling us at 800-296-5088. Significant natural gas in your furnace or a fractured heat exchanger are serious troubles that require immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide heated air throughout your residence. If the ductwork wasn’t installed correctly or is getting old, it can be loud when your furnace is on. This can be the issue if your furnace makes a banging noise when it shuts off. Call AZ Air Conditioning and Heating at 800-296-5088 and we’ll determine the problem.

2. Furnace Buzzes Constantly

If you hear your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound typically indicates an electrical problem, 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 isn’t tight enough, you might detect a low humming noise in the furnace when off. Your furnace also uses a blower motor, which distributes warm or cold air throughout your residence, and a capacitor, which triggers the motor. If either of these components are fading, 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 related to something little, like a loose screw, or something major, like a broken piece. In either case, we urge you to shut your furnace off and calling our heating specialists at 800-296-5088 for assistance.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s attempting to tell you it could use some TLC. If you’ve neglected furnace maintenance the past few years, belts could be worn down or a bearing may need to be lubricated. We know that maintenance frequently slips your mind, but our professionals can get your furnace running quietly again fast.

5. Furnace Whistles

When you’re detecting your furnace making a whistling noise, it’s typically because of an air leak in your ductwork. You may also be aware of whistling while the furnace is running if a floor vent isn’t secure. If you’ve examined your vents but are still noticing whistling, AZ Air Conditioning and Heating can provide support. It’s important to get loose ductwork fixed quickly, since it can make comfort troubles in your residence and drive up your utility expenses.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a good sign if you hear your furnace making a grinding noise. This metal-on-metal noise typically means there’s trouble with your furnace’s blower. Turn off your furnace off now and call our pros at 800-296-5088 for support.

When you’re noticing a weird noise from your furnace, AZ Air Conditioning and Heating is ready to support you. Contact us at 800-296-5088 to request your furnace repair appointment right away.