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

October 13, 2020

When your furnace is working like it should, it should provide warm air without generating too much sound. While it’s common to hear your furnace making noise as it turns on, other disruptions are showing your furnace requires immediate professional help.

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 pros are here to assist with the best furnace repair in Redford, MI.

1. Furnace Making a Banging Noise

You could have a critical issue on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it might signal there could be a few problems. These involve gas increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system becomes filthy over the years, so that’s why it’s essential to set routine furnace maintenance with Airtronic Heating & Cooling. One of the jobs our pros do during this service is clean your furnace’s burners. When this component gets grimy, you could hear your furnace making a loud rumbling noise after ignition is delayed. The ensuing gas buildup can crack your furnace’s heat exchanger, where natural gas transforms into heat. Any breaks in it can leak carbon monoxide, which is regularly emitted outdoors. This toxic gas can be lethal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Airtronic Heating & Cooling urges you to turn it off and reaching us at 313-230-4053. Significant natural gas in your furnace or a fractured heat exchanger are hazardous issues that necessitate immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to deliver warm air throughout your home. If the ductwork wasn’t installed right or is getting dated, it can make a lot of noise when your furnace is heating. This might be the problem if your furnace makes a banging noise when it shuts off. Contact Airtronic Heating & Cooling at 313-230-4053 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

If you notice your furnace making a buzzing noise, don’t delay calling us. A buzzing sound usually 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 may detect a low humming noise in the furnace when off. Your furnace also uses a blower motor, which distributes warm or cold air around your residence, and a capacitor, which triggers the motor. If either of these components 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 may be the result of something little, like an unsecure screw, or something serious, like a broken component. In either case, we urge you to shut your furnace off and calling our heating pros at 313-230-4053 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s attempting to tell you it requires some TLC. If you’ve skipped furnace maintenance the past few years, belts could be worn out or a bearing may need to be greased. We are aware that maintenance often slips your mind, but our techs can get your furnace running quietly again quickly.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s typically because of an air leak in your ductwork. You might also be aware of whistling while the furnace is on if a floor vent isn’t secure. If you’ve checked your vents but are still sensing noise, Airtronic Heating & Cooling can help. It’s important to get loose ductwork fixed quickly, because it can create comfort problems in your home and increase your heating costs.

6. Furnace Making a Grinding Noise

It’s not a positive sign if you detect your furnace making a grinding noise. This metal-on-metal racket typically means there’s trouble with your furnace’s blower. Turn off your furnace off promptly and reach our pros at 313-230-4053 for assistance.

When you’re noticing an atypical noise from your furnace, Airtronic Heating & Cooling is ready to help. Contact us at 313-230-4053 to schedule your furnace repair appointment now.