When your furnace is running like it should, it should deliver warm air without generating too much disruption. While it’s expected to notice your furnace making noise as it begins running, other noises are showing your furnace needs immediate professional assistance.

Here are some of the most common furnace noises and what they could be signaling. If your furnace is making a weird noise, our friendly heating professionals are here to assist with the best furnace repair in Los Angeles, California.

1. Furnace Makes a Banging Sound

You may have a critical issue on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it can 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 gets dirty over time, so that’s why it’s critical to book routine furnace maintenance with AZ Air Conditioning and Heating. One of the tasks our pros perform during this service is clean your furnace’s burners. When this piece gets dirty, you might hear your furnace making a loud rumbling noise when ignition takes more time. The subsequent gas buildup might crack your furnace’s heat exchanger, where natural gas changes into warm air. Any cracks in it can discharge carbon monoxide, which is normally emitted outside. This hazardous gas can be fatal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, AZ Air Conditioning and Heating advises turning it off and reaching us at 800-296-5088. Significant natural gas in your furnace or a broken heat exchanger are dangerous issues that should get immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to deliver warm air across your home. If the ductwork wasn’t installed right or is getting old, it can be loud when your furnace is heating. This could be the case 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 delay calling us. A buzzing sound frequently indicates an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to run on the right voltage. If wires or the box isn’t tight enough, you might hear a low humming noise in the furnace when off. Your furnace also has a blower motor, which moves heated or cooled air throughout your rooms, and a capacitor, which turns on the motor. If either of these pieces are going out, they will buzz when the furnace turns on.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it could be due to something small, like a loose screw, or something serious, like a broken component. In either case, we urge you to shut your furnace off and contacting our heating specialists at 800-296-5088 for support.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s making an effort to get your attention it needs some TLC. If you’ve forgotten furnace maintenance the last couple of years, belts could be worn out or a bearing could need to be lubricated. We are aware that maintenance sometimes slips your mind, but our technicians can get your furnace operating quietly again rapidly.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s frequently because of an air leak in your ductwork. You could also hear whistling while the furnace is on if a floor vent isn’t tight. If you’ve checked your vents but are still noticing noise, AZ Air Conditioning and Heating can help. It’s essential to get loose ductwork repaired without delay, since it can make comfort problems in your residence and inflate your heating expenses.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not an encouraging sign if you hear your furnace making a grinding noise. This metal-on-metal racket usually means there’s a problem with your furnace’s blower. Switch off your furnace off instantly and contact us at 800-296-5088 for assistance.

When you’re getting a strange noise from your furnace, AZ Air Conditioning and Heating is here to provide assistance. Contact us at 800-296-5088 to schedule your furnace repair appointment today.