When your furnace is operating like it should, it should provide warmth without creating too much noise. While it’s expected to notice your furnace making noise as it begins running, other disruptions are showing your furnace needs immediate professional support.

Here are some of the most frequent furnace noises and what they can be signaling. If your furnace is making a weird noise, our friendly heating pros are here to help with the best furnace repair in Pacheco, California.

1. Furnace Makes a Banging Sound

You may have a serious situation on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it might mean there could be several problems. These range from gas building up in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system gets grimy over time, so that’s why it’s essential to schedule annual furnace maintenance with Clean Air HVAC. One of the jobs our professionals perform during this work is clean your furnace’s burners. When this part gets grubby, you may hear your furnace making a loud rumbling noise when ignition is delayed. The ensuing 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 regularly released outdoors. This hazardous gas can be lethal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Clean Air HVAC recommends turning it off and reaching us at 925-233-6238. Significant natural gas in your furnace or a broken heat exchanger are dangerous troubles that require prompt attention.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to deliver heated air across your residence. If the ductwork wasn’t put in properly or is getting old, it can be noisy when your furnace is heating. This might be the case if your furnace makes a banging noise when it shuts off. Call Clean Air HVAC at 925-233-6238 and we’ll determine the problem.

2. Furnace Buzzes Constantly

If you hear your furnace making a buzzing noise, don’t delay calling us. A buzzing sound typically means there’s an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to work 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 sends heated or cooled air around your space, and a capacitor, which triggers the motor. If either of these components are failing, they will buzz when the furnace starts.

3. Furnace Rattles

If your furnace is making a rattling noise, it may be the result of something minor, like an unsecure screw, or something serious, like a broken part. In either case, we recommend shutting off your furnace and calling our heating professionals at 925-233-6238 for assistance.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s trying to alert you it could use some TLC. If you’ve forgotten furnace maintenance the past few years, belts could be worn out or a bearing may need to be greased. We are aware that maintenance often slips your mind, but our professionals can get your furnace running quietly again quickly.

5. Furnace Whistles

When you’re hearing your furnace making a whistling noise, it’s likely the result of an air leak in your ductwork. You may also hear whistling while the furnace is operating if a floor vent isn’t secure. If you’ve looked at your vents but are still hearing noise, Clean Air HVAC can provide support. It’s important to get loose ductwork fixed fast, since it can make comfort troubles in your home and drive up your heating bills.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal noise often means there’s an issue with your furnace’s blower. Switch off your furnace off immediately and contact our professionals at 925-233-6238 for help.

When you’re getting a strange noise from your furnace, Clean Air HVAC is available to provide assistance. Contact us at 925-233-6238 to request your furnace repair appointment right away.