Banging, Screeching and Rattling: What 6 Typical Furnace Noises Signify

October 13, 2020

When your furnace is operating like it should, it should provide heat without generating too much noise. While it’s expected to catch your furnace making noise as it turns on, other noises are showing your furnace needs immediate professional help.

Here are some of the most common furnace noises and what they can mean. If your furnace is making a weird noise, our friendly heating professionals are here to fix the problem with the best furnace repair in Heflin.

1. Furnace Making a Banging Noise

You could have an urgent problem 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 few problems. These range from gas increasing in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system becomes grimy as time passes, so that’s why it’s critical to book yearly furnace maintenance with Bain Heating & Air Conditioning, Inc. One of the things our technicians perform during this work is clean your furnace’s burners. When this piece gets dirty, you might hear your furnace making a loud rumbling noise if ignition takes more time. The following gas buildup may break your furnace’s heat exchanger, where natural gas turns into warm air. Any fractures in it can leak carbon monoxide, which is regularly emitted away from your home. This hazardous gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Bain Heating & Air Conditioning, Inc recommends turning it off and contacting us at 256-270-1196. Too much natural gas in your furnace or a cracked heat exchanger are dangerous troubles that necessitate fast service.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to move heated air throughout your residence. If the ductwork wasn’t designed correctly or is getting old, it can be noisy when your furnace is on. This could be the issue if your furnace makes a banging noise when it shuts off. Call Bain Heating & Air Conditioning, Inc at 256-270-1196 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 means there’s an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to work on the right voltage. If wires or the box is loose, you might hear a low humming noise in the furnace when off. Your furnace also uses a blower motor, which sends warm or chilly air around your rooms, and a capacitor, which turns on the motor. If either of these pieces are failing, they will buzz when the furnace turns on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it might be the result of something little, like a loose screw, or something major, like a broken component. In either case, we urge you to shut your furnace off and contacting our heating professionals at 256-270-1196 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s attempting to tell you it requires some TLC. If you’ve neglected furnace maintenance the last couple of years, belts could be worn down or a bearing may need to be lubricated. We realize that maintenance sometimes slips your mind, but our technicians can get your furnace heating quietly again fast.

5. Furnace Making a Whistling Noise

When you’re noticing your furnace making a whistling noise, it’s likely due to an air leak in your ductwork. You may also notice whistling while the furnace is operating if a floor vent is loose. If you’ve examined your vents but are still noticing whistling, Bain Heating & Air Conditioning, Inc can provide support. It’s critical to get loose ductwork taken care of quickly, because it can create comfort issues in your house and drive up your gas costs.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you hear your furnace making a grinding noise. This metal-on-metal noise usually means there’s an issue with your furnace’s blower. Shut down your furnace off instantly and call our professionals at 256-270-1196 for assistance.

When you’re noticing an atypical noise from your furnace, Bain Heating & Air Conditioning, Inc is available to provide assistance. Contact us at 256-270-1196 to schedule your furnace repair appointment now.