Banging, Screeching and Rattling: What Six Familiar Furnace Noises Mean

When your furnace is working correctly, it should give warm air without creating too much sound. While it’s normal to catch your furnace making noise as it starts up, other disruptions are indicating your furnace should get immediate professional help.

Here are some of the most reported furnace noises and what they might be indicating. If your furnace is making an atypical noise, our friendly heating specialists are here to assist with the best furnace repair in Norco and surrounding parishes, Louisiana.

1. Furnace Making a Banging Noise

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

Banging Sounds Coming from Your Furnace

Your heating system gets grimy over time, so that’s why it’s important to set seasonal furnace maintenance with Mayeuxs AC & Heating. One of the jobs our professionals complete during this work is clean your furnace’s burners. When this piece gets grubby, you might hear your furnace making a loud rumbling noise if ignition is delayed. The ensuing gas buildup may crack your furnace’s heat exchanger, where natural gas transforms into warmth. Any cracks in it can emit carbon monoxide, which is regularly emitted away from your home. This hazardous gas can be deadly in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Mayeuxs AC & Heating urges you to turn it off and contacting us at (985) 764-2426. Too much natural gas in your furnace or a broken heat exchanger are serious problems that should get prompt service.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide warm air across your residence. If the ductwork wasn’t designed right or is getting dated, it can make a lot of noise when your furnace is on. This could be the issue if your furnace makes a banging noise when it shuts off. Get in touch with Mayeuxs AC & Heating at (985) 764-2426 and we’ll determine 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 often means there’s an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to operate on the proper voltage. If wires or the box is loose, you might notice a low humming noise in the furnace when off. Your furnace also uses a blower motor, which sends heated or cold air across your residence, and a capacitor, which turns on the motor. If either of these parts are going out, they will buzz when the furnace switches on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it can be due to something minor, like an unsecure screw, or something serious, like a broken piece. In either case, we urge you to shut your furnace off and calling our heating specialists at (985) 764-2426 for assistance.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s trying to get your attention it needs some TLC. If you’ve skipped furnace maintenance recently, belts could be worn out or a bearing could need to be lubed. We are aware that maintenance frequently slips your mind, but our techs can get your furnace running quietly again rapidly.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re detecting your furnace making a whistling noise, it’s typically due to an air leak in your ductwork. You may also be aware of whistling while the furnace is running if a floor vent isn’t tight. If you’ve looked at your vents but are still sensing whistling, Mayeuxs AC & Heating can help. It’s essential to get loose ductwork fixed fast, as it can create comfort troubles in your home and drive up your gas expenses.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a good sign if you hear your furnace making a grinding noise. This metal-on-metal sound often means there’s an issue with your furnace’s blower. Switch off your furnace off promptly and reach our professionals at (985) 764-2426 for assistance.

When you’re getting a strange noise from your furnace, Mayeuxs AC & Heating is available to provide assistance. Contact us at (985) 764-2426 to book your furnace repair appointment now.