When your furnace is operating like it should, it should deliver heat without generating too much sound. While it’s normal to notice your furnace making noise as it turns on, other disruptions are signaling your furnace requires immediate professional support.

Here are some of the most common furnace noises and what they might be signaling. If your furnace is making a weird noise, our friendly heating professionals are here to help with the best furnace repair in Dresden, Ontario.

1. Furnace Makes Banging or Knocking Sounds

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

Banging Sounds Coming from Your Furnace

Your heating system gets dirty over time, so that’s why it’s important to schedule seasonal furnace maintenance with McFadden Heating & Cooling. One of the tasks our pros perform during this appointment is clean your furnace’s burners. When this piece gets dirty, you might hear your furnace making a loud rumbling noise if ignition is delayed. The ensuing gas buildup can fracture your furnace’s heat exchanger, where natural gas changes into heat. Any fractures in it can discharge carbon monoxide, which is regularly released away from your home. This dangerous gas can be lethal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, McFadden Heating & Cooling recommends turning it off and calling us at 519-683-2339. Excessive natural gas in your furnace or a broken heat exchanger are dangerous issues that necessitate fast service.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to move hot air throughout your house. If the ductwork wasn’t installed right or is aging, it can be loud when your furnace runs. This can be the case if your furnace makes a banging noise when it shuts off. Contact McFadden Heating & Cooling at 519-683-2339 and we’ll figure out the problem.

2. Furnace Makes a Buzzing Sound

If you observe your furnace making a buzzing noise, don’t wait to call us. A buzzing sound usually means there’s an electrical problem, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to operate on the proper voltage. If wires or the box is loose, you may hear a low humming noise in the furnace when off. Your furnace also uses a blower motor, which sends heated or chilly air across your residence, and a capacitor, which starts the motor. If either of these components are fading, 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 could be due to something little, like an unsecure screw, or something serious, like a broken piece. In either case, we urge you to shut your furnace off and getting in touch with our heating specialists at 519-683-2339 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s attempting to alert you it could use some TLC. If you’ve neglected furnace maintenance recently, belts could be worn out or a bearing might need to be lubricated. We know that maintenance frequently slips your mind, but our professionals can get your furnace running quietly again quickly.

5. Furnace Whistles

When you’re noticing your furnace making a whistling noise, it’s typically due to an air leak in your ductwork. You may also be aware of whistling while the furnace is working if a floor vent isn’t secure. If you’ve looked at your vents but are still hearing noise, McFadden Heating & Cooling can provide support. It’s important to get loose ductwork fixed quickly, because it can create comfort troubles in your house and inflate your gas expenses.

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 sound typically means there’s a problem with your furnace’s blower. Shut down your furnace off instantly and call us at 519-683-2339 for assistance.

When you’re getting a weird noise from your furnace, McFadden Heating & Cooling is available to provide assistance. Contact us at 519-683-2339 to schedule your furnace repair appointment now.