When your furnace is working properly, it should provide warm air without making too much disruption. While it’s expected to catch your furnace making noise as it turns on, other noises are signaling your furnace requires immediate professional help.

Here are some of the most common furnace noises and what they might be signaling. If your furnace is making a weird noise, our friendly heating specialists are here to help with the best furnace repair in Lafayette, Louisiana.

1. Furnace Makes Banging or Knocking Sounds

You might have an urgent issue on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it can indicate there could be several problems. These involve gas accumulating in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system becomes dirty over time, so that’s why it’s essential to schedule yearly furnace maintenance with AC Sales. One of the things our technicians complete during this work is clean your furnace’s burners. When this part gets dirty, you could hear your furnace making a loud rumbling noise if ignition takes longer than normal. The ensuing gas buildup can break your furnace’s heat exchanger, where natural gas turns into warm air. Any fractures in it can discharge carbon monoxide, which is ordinarily emitted outdoors. This dangerous 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 reaching us at (337) 234-2345. Too much natural gas in your furnace or a ruptured heat exchanger are critical troubles that require prompt attention.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to deliver hot air across your residence. If the ductwork wasn’t installed correctly or is aging, it can make a lot of noise when your furnace is heating. This could be the case if your furnace makes a banging noise when it shuts off. Call 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 problem, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to operate on the right voltage. If wires or the box is loose, you may hear a low humming noise in the furnace when off. Your furnace also has a blower motor, which sends hot or cooled air across your rooms, and a capacitor, which triggers the motor. If either of these parts are going out, they will buzz when the furnace switches on.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it may be due to something small, like an unsecure screw, or something critical, like a broken component. In either case, we advise shutting your furnace off and getting in touch with our heating pros at (337) 234-2345 for help.

4. Furnace Squeals

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

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s frequently the result of an air leak in your ductwork. You could also hear whistling while the furnace is on if a floor vent isn’t secure. If you’ve looked at your vents but are still noticing whistling, AC Sales can assist you. It’s essential to get loose ductwork fixed quickly, as it can make comfort problems in your residence and drive up your heating costs.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal sound often means there’s an issue with your furnace’s blower. Shut down your furnace off immediately and reach our pros at (337) 234-2345 for assistance.

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