When your furnace is working correctly, it should provide heat without creating too much sound. While it’s expected to catch your furnace making noise as it starts up, other sounds are indicating your furnace needs immediate professional help.

Here are some of the most frequent 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 Athol, Idaho.

1. Furnace Makes a Banging Sound

You could have a critical situation 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 few problems. These include gas accumulating in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system gets grimy over time, so that’s why it’s essential to schedule seasonal furnace maintenance with Alpine Summit Heating & Cooling. One of the jobs our techs perform during this appointment is clean your furnace’s burners. When this component gets grubby, you may hear your furnace making a loud rumbling noise after ignition takes longer than normal. The ensuing gas buildup might fracture your furnace’s heat exchanger, where natural gas transforms into warmth. Any cracks in it can discharge carbon monoxide, which is regularly released outside. This toxic gas can be fatal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Alpine Summit Heating & Cooling recommends turning it off and reaching us at 208-561-1226. Excessive natural gas in your furnace or a ruptured heat exchanger are serious troubles that require fast attention.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to move heated air throughout your house. If the ductwork wasn’t designed properly or is aging, it can be noisy when your furnace runs. This could be the issue if your furnace makes a banging noise when it shuts off. Call Alpine Summit Heating & Cooling at 208-561-1226 and we’ll determine 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 typically indicates an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace uses an internal transformer to work on the proper voltage. If wires or the box isn’t tight enough, you may hear a low humming noise in the furnace when off. Your furnace also uses a blower motor, which moves heated or cold air across your home, and a capacitor, which turns on the motor. If either of these pieces are failing, they will buzz when the furnace turns on.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it can be related to something little, 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 208-561-1226 for assistance.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s trying to alert you it requires some TLC. If you’ve skipped furnace maintenance recently, belts could be worn out or a bearing could need to be lubed. We are aware that maintenance frequently slips your mind, but our technicians can get your furnace running quietly again fast.

5. Furnace Making a Whistling Noise

When you’re noticing your furnace making a whistling noise, it’s likely due to an air leak in your ductwork. You could also be aware of whistling while the furnace is on if a floor vent isn’t tight. If you’ve looked at your vents but are still sensing sound, Alpine Summit Heating & Cooling can assist you. It’s critical to get loose ductwork repaired fast, as it can result in comfort issues in your house and increase your utility expenses.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you hear your furnace making a grinding noise. This metal-on-metal racket usually means there’s an issue with your furnace’s blower. Switch off your furnace off instantly and call our pros at 208-561-1226 for assistance.

When you’re getting an uncommon noise from your furnace, Alpine Summit Heating & Cooling is available to support you. Contact us at 208-561-1226 to request your furnace repair appointment now.