Banging, Screeching and Rattling: What Six Ordinary Furnace Noises Signify

When your furnace is running like it should, it should deliver heat without generating too much sound. While it’s expected to notice your furnace making noise as it turns on, other disruptions are showing your furnace should get immediate professional support.

Here are some of the most common furnace noises and what they might mean. If your furnace is making a weird noise, our friendly heating specialists are here to assist with the best furnace repair in Lake Forest, California.

1. Furnace Making a Banging Noise

You might have a critical problem on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it can mean there could be a few problems. These include gas increasing in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system turns grimy over the years, so that’s why it’s essential to book seasonal furnace maintenance with 1st Choice Heating & Air Conditioning. One of the tasks our techs do during this appointment is clean your furnace’s burners. When this component gets grubby, you may hear your furnace making a loud rumbling noise after ignition takes longer than normal. The subsequent gas buildup can break your furnace’s heat exchanger, where natural gas transforms into heat. Any fractures in it can leak carbon monoxide, which is regularly released away from your home. This hazardous gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, 1st Choice Heating & Air Conditioning urges you to turn it off and calling us at 949-204-0859. Excessive natural gas in your furnace or a broken heat exchanger are serious problems that necessitate immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to provide hot air throughout your home. If the ductwork wasn’t installed properly or is aging, it can be noisy when your furnace is on. This might be the case if your furnace makes a banging noise when it shuts off. Contact 1st Choice Heating & Air Conditioning at 949-204-0859 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

If you notice your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound frequently indicates an electrical problem, like with its transformer, blower motor or capacitor.

Your furnace uses an internal transformer to run on the proper voltage. If wires or the box isn’t tight enough, you may notice a low humming noise in the furnace when off. Your furnace also has a blower motor, which distributes hot or cooled air across your space, and a capacitor, which starts the motor. If either of these components are going out, they will buzz when the furnace switches on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it can be related to something minor, like an unfastened screw, or something major, like a broken part. In either case, we advise shutting your furnace off and calling our heating pros at 949-204-0859 for assistance.

4. Furnace Making a Squealing Noise

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

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You might also be aware of whistling while the furnace is operating if a floor vent is loose. If you’ve examined your vents but are still hearing noise, 1st Choice Heating & Air Conditioning can provide support. It’s essential to get loose ductwork repaired without delay, since it can make comfort issues in your home and increase your heating costs.

6. Furnace Making a Grinding Noise

It’s not a good sign if you notice your furnace making a grinding noise. This metal-on-metal sound frequently means there’s an issue with your furnace’s blower. Switch off your furnace off right away and contact our professionals at 949-204-0859 for support.

When you’re noticing a weird noise from your furnace, 1st Choice Heating & Air Conditioning is available to provide assistance. Contact us at 949-204-0859 to schedule your furnace repair appointment now.