When your furnace is operating properly, it should provide heat without generating too much noise. While it’s normal 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 could mean. If your furnace is making a weird noise, our friendly heating specialists are here to fix the problem with the best furnace repair in The Bay Area, California.

1. Furnace Making a Banging Noise

You might 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 signal there could be several problems. These range from gas increasing in your furnace or a ductwork situation.

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 Contra Costa Heating & AC. One of the jobs our technicians do during this work is clean your furnace’s burners. When this part gets dirty, you could hear your furnace making a loud rumbling noise after ignition takes more time. The subsequent gas buildup might fracture your furnace’s heat exchanger, where natural gas turns into heat. Any breaks in it can emit carbon monoxide, which is regularly released outside. This toxic gas can be fatal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Contra Costa Heating & AC advises turning it off and reaching us at 510-343-9841. Too much natural gas in your furnace or a fractured heat exchanger are hazardous troubles that should get fast repairs.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to deliver heated air around your residence. If the ductwork wasn’t installed correctly or is getting old, it can be loud when your furnace is heating. This can be the issue if your furnace makes a banging noise when it shuts off. Get in touch with Contra Costa Heating & AC at 510-343-9841 and we’ll pinpoint the problem.

2. Furnace Buzzes Constantly

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

Your furnace relies on an internal transformer to operate on the proper voltage. If wires or the box is loose, you may hear a low humming noise in the furnace when off. Your furnace also uses a blower motor, which distributes heated or cooled air across your house, and a capacitor, which triggers the motor. If either of these parts 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 the result of something little, like a loose screw, or something serious, like a broken part. In either case, we advise shutting your furnace off and getting in touch with our heating professionals at 510-343-9841 for assistance.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s attempting to tell you it could use 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 greased. We realize that maintenance frequently slips your mind, but our techs can get your furnace running quietly again fast.

5. Furnace Whistles

When you’re hearing your furnace making a whistling noise, it’s frequently due to an air leak in your ductwork. You could also be aware of whistling while the furnace is operating if a floor vent is loose. If you’ve checked your vents but are still sensing noise, Contra Costa Heating & AC can help. It’s critical to get loose ductwork fixed fast, because it can make comfort issues in your home and inflate your heating costs.

6. Furnace Making a Grinding Noise

It’s not a good sign if you hear your furnace making a grinding noise. This metal-on-metal racket typically means there’s a problem with your furnace’s blower. Turn off your furnace off instantly and contact our professionals at 510-343-9841 for help.

When you’re noticing a strange noise from your furnace, Contra Costa Heating & AC is here to help. Contact us at 510-343-9841 to book your furnace repair appointment now.