Banging, Hissing and Rattling: What Six Typical Furnace Noises Indicate

When your furnace is running properly, it should deliver warm air without creating too much disruption. While it’s expected to notice your furnace making noise as it starts up, other sounds are signaling your furnace needs immediate professional assistance.

Here are some of the most frequent furnace noises and what they can be signaling. If your furnace is making an atypical noise, our friendly heating specialists are here to assist with the best furnace repair in Mission Viejo, California.

1. Furnace Making a Banging Noise

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

Banging Sounds Coming from Your Furnace

Your heating system becomes filthy over time, so that’s why it’s essential to set yearly furnace maintenance with 1st Choice Heating & Air Conditioning. One of the things our pros perform during this appointment is clean your furnace’s burners. When this piece gets grubby, you could hear your furnace making a loud rumbling noise if ignition takes longer than normal. The following gas buildup can break your furnace’s heat exchanger, where natural gas transforms into warmth. Any cracks in it can leak carbon monoxide, which is ordinarily emitted away from your home. This dangerous gas can be lethal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, 1st Choice Heating & Air Conditioning urges you to turn it off and contacting us at 949-204-0859. Significant natural gas in your furnace or a cracked heat exchanger are serious troubles that necessitate immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to provide heated air throughout your residence. If the ductwork wasn’t put in right or is getting dated, it can be noisy when your furnace runs. This can be the problem if your furnace makes a banging noise when it shuts off. Contact 1st Choice Heating & Air Conditioning at 949-204-0859 and we’ll determine 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 usually is telling you there’s an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to operate on the correct voltage. If wires or the box isn’t tight enough, you may hear a low humming noise in the furnace when off. Your furnace also works with a blower motor, which distributes heated or chilly air throughout your rooms, and a capacitor, which triggers the motor. If either of these parts are fading, they will buzz when the furnace switches on.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it could be the result of something minor, like an unsecure screw, or something major, like a broken part. In either case, we recommend shutting off your furnace and getting in touch with our heating professionals at 949-204-0859 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s making an effort to tell you it needs some TLC. If you’ve neglected furnace maintenance the last couple of years, belts could be worn down or a bearing might need to be greased. We are aware that maintenance often slips your mind, but our pros can get your furnace operating quietly again fast.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s likely due to an air leak in your ductwork. You might also be aware of whistling while the furnace is running if a floor vent isn’t secure. If you’ve looked at your vents but are still sensing whistling, 1st Choice Heating & Air Conditioning can help. It’s important to get loose ductwork taken care of quickly, as it can create comfort issues in your house and drive up your gas costs.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a positive sign if you hear your furnace making a grinding noise. This metal-on-metal sound frequently means there’s a problem with your furnace’s blower. Shut down your furnace off right away and reach us at 949-204-0859 for support.

When you’re noticing an uncommon noise from your furnace, 1st Choice Heating & Air Conditioning is ready to help. Contact us at 949-204-0859 to request your furnace repair appointment now.