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

October 13, 2020

When your furnace is working correctly, it should give warmth without creating too much noise. While it’s common to notice your furnace making noise as it begins running, other noises are indicating your furnace should get immediate professional assistance.

Here are some of the most common furnace noises and what they might mean. If your furnace is making an odd noise, our friendly heating professionals are here to assist with the best furnace repair in Hodgenville, KY.

1. Furnace Making a Banging Noise

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

Banging Sounds Coming from Your Furnace

Your heating system gets filthy as time passes, so that’s why it’s critical to book yearly furnace maintenance with Phelps Heating & Cooling. One of the things our techs perform during this service is clean your furnace’s burners. When this part gets grimy, you might hear your furnace making a loud rumbling noise if ignition is delayed. The following gas buildup might crack your furnace’s heat exchanger, where natural gas changes into warm air. Any fractures in it can discharge carbon monoxide, which is ordinarily vented outdoors. This toxic gas can be lethal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Phelps Heating & Cooling advises turning it off and contacting us at 270-358-3167. Significant natural gas in your furnace or a broken heat exchanger are critical problems that necessitate fast attention.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to deliver heated air across your residence. If the ductwork wasn’t designed properly or is getting dated, it can be loud when your furnace is heating. This could be the case if your furnace makes a banging noise when it shuts off. Get in touch with Phelps Heating & Cooling at 270-358-3167 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

If you hear your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound often 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 correct voltage. If wires or the box is loose, you might hear a low humming noise in the furnace when off. Your furnace also has a blower motor, which moves heated or cooled air around your house, and a capacitor, which triggers the motor. If either of these components are failing, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it could be due to something little, like an unsecure screw, or something major, like a broken part. In either case, we urge you to shut your furnace off and getting in touch with our heating professionals at 270-358-3167 for assistance.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s trying to get your attention it needs some TLC. If you’ve neglected furnace maintenance the last couple of years, belts could be worn out or a bearing might need to be lubricated. We know that maintenance frequently slips your mind, but our pros can get your furnace running quietly again quickly.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s likely the result of an air leak in your ductwork. You might also hear whistling while the furnace is operating if a floor vent is loose. If you’ve checked your vents but are still noticing sound, Phelps Heating & Cooling can assist you. It’s critical to get loose ductwork taken care of fast, as it can result in comfort problems in your residence and drive up your gas bills.

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 racket often means there’s trouble with your furnace’s blower. Turn off your furnace off promptly and contact our professionals at 270-358-3167 for assistance.

When you’re noticing a weird noise from your furnace, Phelps Heating & Cooling is ready to provide assistance. Contact us at 270-358-3167 to schedule your furnace repair appointment right away.