Banging, Screeching and Rattling: What 6 Ordinary Furnace Noises Mean

October 13, 2020

When your furnace is working like it should, it should give heat without making too much disruption. While it’s normal to notice your furnace making noise as it turns on, other sounds are signaling your furnace should get immediate professional support.

Here are some of the most common furnace noises and what they can mean. If your furnace is making an atypical noise, our friendly heating pros are here to help with the best furnace repair in Branchville.

1. Furnace Making a Banging Noise

You may have a critical situation on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it might indicate there could be a couple of problems. These include gas accumulating in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system gets grimy as time passes, so that’s why it’s critical to book seasonal furnace maintenance with Willco Air Conditioning, Refrigeration & Heating Inc.. One of the things our professionals do during this service is clean your furnace’s burners. When this piece gets dirty, you may hear your furnace making a loud rumbling noise after ignition is delayed. The following gas buildup may fracture your furnace’s heat exchanger, where natural gas changes into warm air. Any breaks in it can leak carbon monoxide, which is ordinarily emitted away from your home. This dangerous gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Willco Air Conditioning, Refrigeration & Heating Inc. advises turning it off and calling us at 862-345-6896. Too much natural gas in your furnace or a cracked heat exchanger are hazardous problems that should get fast repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide heated air around your home. If the ductwork wasn’t designed properly or is getting dated, it can make a lot of noise when your furnace runs. This could be the case if your furnace makes a banging noise when it shuts off. Get in touch with Willco Air Conditioning, Refrigeration & Heating Inc. at 862-345-6896 and we’ll determine the problem.

2. Furnace Making a Buzzing Noise

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

Your furnace depends on an internal transformer to work on the correct voltage. If wires or the box isn’t tight enough, you might notice a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves heated or chilly air throughout your house, and a capacitor, which starts the motor. If either of these pieces are fading, they will buzz when the furnace turns on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it can be the result of something small, like an unfastened screw, or something major, like a broken piece. In either case, we advise shutting your furnace off and calling our heating pros at 862-345-6896 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s trying to alert you it requires some TLC. If you’ve skipped furnace maintenance the last couple of years, belts could be worn out or a bearing may need to be greased. We know that maintenance often slips your mind, but our technicians can get your furnace running quietly again rapidly.

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 may also hear whistling while the furnace is on if a floor vent isn’t secure. If you’ve looked at your vents but are still noticing sound, Willco Air Conditioning, Refrigeration & Heating Inc. can help. It’s important to get loose ductwork repaired fast, since it can create comfort problems in your residence and drive up your gas costs.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you detect your furnace making a grinding noise. This metal-on-metal noise usually means there’s an issue with your furnace’s blower. Switch off your furnace off promptly and contact us at 862-345-6896 for assistance.

When you’re noticing an atypical noise from your furnace, Willco Air Conditioning, Refrigeration & Heating Inc. is here to help. Contact us at 862-345-6896 to schedule your furnace repair appointment now.