When your furnace is running correctly, it should deliver warm air without making too much sound. While it’s normal to hear your furnace making noise as it starts up, other noises are showing your furnace requires immediate professional support.

Here are some of the most common furnace noises and what they might be indicating. If your furnace is making an odd noise, our friendly heating specialists are here to fix the problem with the best furnace repair in Lafayette, Louisiana.

1. Furnace Making a Banging Noise

You might have a critical problem on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it can mean there could be a couple of problems. These include gas increasing in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system gets filthy over time, so that’s why it’s critical to set seasonal furnace maintenance with AC Sales. One of the jobs our professionals complete during this service is clean your furnace’s burners. When this component gets dirty, you may hear your furnace making a loud rumbling noise if ignition takes more time. The subsequent gas buildup may fracture your furnace’s heat exchanger, where natural gas changes into warmth. Any cracks in it can leak carbon monoxide, which is normally released outdoors. This hazardous gas can be fatal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, AC Sales recommends turning it off and calling us at (337) 234-2345. Excessive natural gas in your furnace or a broken heat exchanger are dangerous issues that necessitate fast repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to move hot air across your house. If the ductwork wasn’t designed right or is getting dated, it can be loud when your furnace runs. This could be the issue if your furnace makes a banging noise when it shuts off. Get in touch with AC Sales at (337) 234-2345 and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

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

Your furnace relies on an internal transformer to work on the proper voltage. If wires or the box needs to be tightened, you might hear a low humming noise in the furnace when off. Your furnace also works with a blower motor, which sends hot or chilly air throughout your house, and a capacitor, which triggers the motor. If either of these parts are going out, they will buzz when the furnace turns on.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it could be related to something little, like an unfastened screw, or something serious, like a broken part. In either case, we recommend shutting off your furnace and contacting our heating specialists at (337) 234-2345 for support.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s making an effort to alert you it could use some TLC. If you’ve forgotten furnace maintenance recently, belts could be worn out or a bearing could need to be lubed. We know that maintenance often slips your mind, but our technicians can get your furnace heating quietly again fast.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s typically because of an air leak in your ductwork. You may also hear whistling while the furnace is working if a floor vent is loose. If you’ve examined your vents but are still sensing sound, AC Sales can provide support. It’s essential to get loose ductwork repaired without delay, because it can result in comfort troubles in your residence and increase your utility bills.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a positive sign if you hear your furnace making a grinding noise. This metal-on-metal sound often means there’s a problem with your furnace’s blower. Turn off your furnace off instantly and call our pros at (337) 234-2345 for support.

When you’re getting a strange noise from your furnace, AC Sales is here to help. Contact us at (337) 234-2345 to book your furnace repair appointment right away.