When your furnace is operating correctly, it should deliver heat without making too much disruption. While it’s expected to catch your furnace making noise as it begins running, other sounds are showing your furnace should get immediate professional assistance.

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 help with the best furnace repair in McKinney and Frisco, Texas.

1. Furnace Makes Banging or Knocking Sounds

You could 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 may signal there could be several problems. These range from gas increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system becomes filthy as time passes, so that’s why it’s critical to book seasonal furnace maintenance with Bell Mechanical Services. One of the tasks our professionals perform during this appointment is clean your furnace’s burners. When this component gets grubby, you might hear your furnace making a loud rumbling noise when ignition is delayed. The subsequent gas buildup might crack your furnace’s heat exchanger, where natural gas changes into warm air. Any cracks in it can leak carbon monoxide, which is regularly released away from your home. This dangerous gas can be lethal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Bell Mechanical Services urges you to turn it off and calling us at 888-863-0560. Too much natural gas in your furnace or a broken heat exchanger are hazardous issues that should get immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to move warm air across your house. If the ductwork wasn’t put in correctly or is aging, it can be loud when your furnace is heating. This may be the issue if your furnace makes a banging noise when it shuts off. Get in touch with Bell Mechanical Services at 888-863-0560 and we’ll determine the problem.

2. Furnace Makes a Buzzing Sound

If you hear your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound often is telling you there’s an electrical problem, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to work on the right voltage. If wires or the box is loose, you could notice a low humming noise in the furnace when off. Your furnace also uses a blower motor, which sends heated or chilly air around your home, and a capacitor, which turns on the motor. If either of these pieces are fading, they will buzz when the furnace starts.

3. Furnace Rattles

If your furnace is making a rattling noise, it could be related to something small, like an unsecure screw, or something critical, like a broken part. In either case, we recommend shutting off your furnace and contacting our heating professionals at 888-863-0560 for help.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s attempting to get your attention it needs some TLC. If you’ve neglected furnace maintenance the past few years, belts could be worn out or a bearing may need to be lubed. We realize that maintenance frequently slips your mind, but our pros can get your furnace operating quietly again fast.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re hearing your furnace making a whistling noise, it’s typically the result of an air leak in your ductwork. You may also hear whistling while the furnace is running if a floor vent isn’t tight. If you’ve checked your vents but are still noticing noise, Bell Mechanical Services can assist you. It’s essential to get loose ductwork taken care of without delay, as it can result in comfort troubles in your house and drive up your energy expenses.

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 racket often means there’s an issue with your furnace’s blower. Shut down your furnace off right away and reach us at 888-863-0560 for support.

When you’re getting a strange noise from your furnace, Bell Mechanical Services is here to support you. Contact us at 888-863-0560 to book your furnace repair appointment today.