When your furnace is working properly, it should provide heat without creating too much disruption. While it’s expected to notice your furnace making noise as it turns on, other sounds are showing your furnace requires immediate professional help.

Here are some of the most reported furnace noises and what they might be indicating. If your furnace is making a strange noise, our friendly heating professionals are here to help with the best furnace repair in Saint Louis, Missouri.

1. Furnace Makes Banging or Knocking Sounds

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

Banging Sounds Coming from Your Furnace

Your heating system turns filthy over the years, so that’s why it’s important to book seasonal furnace maintenance with Morgner Inc. Air Conditioning & Heating. One of the jobs our techs perform during this service is clean your furnace’s burners. When this component gets grubby, you might hear your furnace making a loud rumbling noise if ignition takes longer than normal. The ensuing gas buildup can crack your furnace’s heat exchanger, where natural gas turns into heat. Any fractures in it can emit carbon monoxide, which is normally released away from your home. This hazardous gas can be lethal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Morgner Inc. Air Conditioning & Heating urges you to turn it off and reaching us at 314-262-4541. Excessive natural gas in your furnace or a broken heat exchanger are hazardous issues that should get prompt attention.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to move heated air across your residence. If the ductwork wasn’t installed properly or is getting dated, it can be noisy when your furnace is on. This might be the issue if your furnace makes a banging noise when it shuts off. Call Morgner Inc. Air Conditioning & Heating at 314-262-4541 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

If you notice 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 uses an internal transformer to operate on the correct voltage. If wires or the box isn’t tight enough, you may detect a low humming noise in the furnace when off. Your furnace also uses a blower motor, which distributes warm or cooled air across your home, and a capacitor, which starts the motor. If either of these components 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 could be related to something minor, like an unsecure screw, or something critical, like a broken piece. In either case, we recommend shutting off your furnace and calling our heating specialists at 314-262-4541 for help.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s attempting to get your attention it needs some TLC. If you’ve skipped furnace maintenance the past few years, belts could be worn down or a bearing might need to be lubed. We are aware that maintenance often slips your mind, but our professionals can get your furnace operating quietly again quickly.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re noticing your furnace making a whistling noise, it’s frequently the result of an air leak in your ductwork. You might also notice whistling while the furnace is on if a floor vent isn’t secure. If you’ve examined your vents but are still sensing whistling, Morgner Inc. Air Conditioning & Heating can help. It’s important to get loose ductwork repaired fast, as it can result in comfort problems in your home and increase your gas bills.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not an encouraging sign if you hear your furnace making a grinding noise. This metal-on-metal racket typically means there’s an issue with your furnace’s blower. Turn off your furnace off instantly and call our pros at 314-262-4541 for assistance.

When you’re hearing a strange noise from your furnace, Morgner Inc. Air Conditioning & Heating is available to support you. Contact us at 314-262-4541 to schedule your furnace repair appointment today.