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

October 13, 2020

When your furnace is running properly, it should deliver heat without generating too much sound. While it’s common to notice your furnace making noise as it starts up, other noises are signaling your furnace needs immediate professional assistance.

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

1. Furnace Making a Banging Noise

You may have an urgent situation on your hands if you’re hearing 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 involve gas increasing in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system turns grimy over time, so that’s why it’s essential to set annual furnace maintenance with Watts Electric & A/C Inc. One of the jobs our pros perform during this work is clean your furnace’s burners. When this component gets dirty, you may hear your furnace making a loud rumbling noise if ignition is delayed. The subsequent gas buildup can crack your furnace’s heat exchanger, where natural gas changes into warmth. Any cracks in it can emit carbon monoxide, which is regularly emitted away from your home. This toxic gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Watts Electric & A/C Inc recommends turning it off and reaching us at 601-736-7362. Significant natural gas in your furnace or a ruptured heat exchanger are serious troubles that necessitate immediate attention.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to move warm air across your home. If the ductwork wasn’t installed correctly or is getting dated, it can be loud when your furnace runs. This may be the issue if your furnace makes a banging noise when it shuts off. Call Watts Electric & A/C Inc at 601-736-7362 and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

If you hear 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 run on the correct voltage. If wires or the box needs to be tightened, you might notice a low humming noise in the furnace when off. Your furnace also has a blower motor, which distributes hot or cold air around your residence, and a capacitor, which triggers the motor. If either of these parts 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 could be related to something small, like an unfastened screw, or something serious, like a broken piece. In either case, we urge you to shut your furnace off and contacting our heating professionals at 601-736-7362 for support.

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 requires some TLC. If you’ve neglected furnace maintenance recently, belts could be worn out or a bearing may need to be lubricated. We are aware that maintenance often slips your mind, but our techs can get your furnace running quietly again fast.

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 may also be aware of whistling while the furnace is working if a floor vent isn’t tight. If you’ve looked at your vents but are still hearing noise, Watts Electric & A/C Inc can help. It’s critical to get loose ductwork taken care of without delay, since it can create comfort issues in your house and drive up your gas expenses.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you notice your furnace making a grinding noise. This metal-on-metal noise often means there’s a problem with your furnace’s blower. Turn off your furnace off immediately and reach our professionals at 601-736-7362 for help.

When you’re getting an atypical noise from your furnace, Watts Electric & A/C Inc is ready to provide assistance. Contact us at 601-736-7362 to request your furnace repair appointment right away.