When your furnace is running like it should, it should give warm air without making too much sound. While it’s expected to hear your furnace making noise as it begins running, other sounds are signaling your furnace requires immediate professional assistance.

Here are some of the most frequent furnace noises and what they could be signaling. If your furnace is making a strange noise, our friendly heating professionals are here to fix the problem with the best furnace repair in McKinney and Frisco, Texas.

1. Furnace Makes Banging or Knocking Sounds

You may have an urgent situation 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 a couple of problems. These range from gas accumulating in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system becomes dirty over time, so that’s why it’s essential to set annual furnace maintenance with Bell Mechanical Services. One of the jobs our technicians complete during this service is clean your furnace’s burners. When this component gets grubby, you may hear your furnace making a loud rumbling noise if ignition is delayed. The resulting gas buildup can break your furnace’s heat exchanger, where natural gas transforms into warmth. Any fractures in it can leak carbon monoxide, which is regularly emitted away from your home. This toxic gas can be deadly in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Bell Mechanical Services recommends turning it off and reaching us at 888-863-0560. Excessive natural gas in your furnace or a fractured heat exchanger are serious troubles that necessitate fast service.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide heated air around your residence. If the ductwork wasn’t designed right or is getting dated, it can be noisy when your furnace is heating. This may be the issue if your furnace makes a banging noise when it shuts off. Call Bell Mechanical Services at 888-863-0560 and we’ll determine the problem.

2. Furnace Buzzes Constantly

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

Your furnace relies on an internal transformer to operate on the correct voltage. If wires or the box needs to be tightened, you may hear a low humming noise in the furnace when off. Your furnace also uses a blower motor, which sends warm or cooled air throughout your residence, and a capacitor, which triggers 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 due to something small, like an unfastened screw, or something major, like a broken piece. In either case, we recommend shutting off your furnace and contacting our heating pros at 888-863-0560 for assistance.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s making an effort to tell you it could use some TLC. If you’ve skipped furnace maintenance the past few years, belts could be worn out or a bearing could need to be greased. We realize that maintenance often slips your mind, but our technicians can get your furnace operating quietly again fast.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re detecting your furnace making a whistling noise, it’s likely due to an air leak in your ductwork. You may also notice whistling while the furnace is operating if a floor vent is loose. If you’ve checked your vents but are still sensing sound, Bell Mechanical Services can assist you. It’s critical to get loose ductwork taken care of fast, as it can make comfort problems in your home and drive up your heating costs.

6. Furnace Making a Grinding Noise

It’s not a good sign if you hear your furnace making a grinding noise. This metal-on-metal noise usually means there’s an issue with your furnace’s blower. Turn off your furnace off promptly and call our pros at 888-863-0560 for help.

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