When your furnace is running properly, it should deliver warm air without generating too much sound. While it’s normal to notice your furnace making noise as it begins running, other sounds are showing your furnace requires immediate professional support.

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

1. Furnace Makes Banging or Knocking Sounds

You might have a critical issue on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it may mean there could be several problems. These include gas building up in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system gets filthy over time, so that’s why it’s essential to book seasonal furnace maintenance with AZ Air Conditioning and Heating. One of the things our technicians perform during this work is clean your furnace’s burners. When this piece gets grubby, you might hear your furnace making a loud rumbling noise if ignition takes longer than normal. The subsequent gas buildup might crack your furnace’s heat exchanger, where natural gas changes into warm air. Any fractures in it can emit carbon monoxide, which is normally released outside. This hazardous gas can be lethal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, AZ Air Conditioning and Heating urges you to turn it off and calling us at 800-296-5088. Significant 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 uses ductwork to deliver warm air throughout your house. If the ductwork wasn’t designed right or is aging, it can be loud when your furnace is on. This can be the problem 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 Makes a Buzzing Sound

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

Your furnace uses an internal transformer to run on the right voltage. If wires or the box isn’t tight enough, you could detect a low humming noise in the furnace when off. Your furnace also has a blower motor, which sends hot or chilly air around your space, and a capacitor, which starts the motor. If either of these pieces are going out, 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 can be the result of something small, like an unsecure screw, or something serious, like a broken part. In either case, we urge you to shut your furnace off and contacting our heating specialists at 800-296-5088 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s attempting to tell you it could use some TLC. If you’ve neglected furnace maintenance recently, belts could be worn down or a bearing may need to be greased. We realize that maintenance sometimes slips your mind, but our technicians can get your furnace operating quietly again rapidly.

5. Furnace Whistles

When you’re noticing your furnace making a whistling noise, it’s typically because of an air leak in your ductwork. You could also notice whistling while the furnace is operating if a floor vent isn’t secure. If you’ve checked your vents but are still sensing noise, AZ Air Conditioning and Heating can help. It’s critical to get loose ductwork taken care of quickly, because it can make comfort issues in your residence and inflate your utility bills.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal racket typically means there’s trouble with your furnace’s blower. Switch off your furnace off immediately and reach our professionals at 800-296-5088 for help.

When you’re hearing an atypical noise from your furnace, AZ Air Conditioning and Heating is ready to support you. Contact us at 800-296-5088 to schedule your furnace repair appointment right away.