When your furnace is running correctly, it should provide heat without generating too much disruption. While it’s expected to catch your furnace making noise as it begins running, other disruptions are indicating your furnace should get immediate professional support.

Here are some of the most reported furnace noises and what they can mean. If your furnace is making an odd noise, our friendly heating pros are here to assist with the best furnace repair in Wausau, Wisconsin.

1. Furnace Making a Banging Noise

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 may indicate there could be a couple of problems. These range from gas increasing 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 important to book annual furnace maintenance with Gilray Heating and Cooling. One of the tasks our pros perform during this appointment is clean your furnace’s burners. When this part gets grubby, you might hear your furnace making a loud rumbling noise when ignition takes longer than normal. The resulting gas buildup might crack your furnace’s heat exchanger, where natural gas turns into heat. Any breaks in it can leak carbon monoxide, which is regularly vented outside. This dangerous gas can be fatal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Gilray Heating and Cooling recommends turning it off and reaching us at 715-301-0727. Significant natural gas in your furnace or a broken heat exchanger are hazardous troubles that necessitate immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to move hot air around your residence. If the ductwork wasn’t installed correctly or is getting dated, it can be noisy when your furnace runs. This can be the problem if your furnace makes a banging noise when it shuts off. Get in touch with Gilray Heating and Cooling at 715-301-0727 and we’ll figure out 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 frequently is telling you there’s an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to operate on the correct voltage. If wires or the box isn’t tight enough, you might notice a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves heated or cold air around your space, and a capacitor, which triggers the motor. If either of these components are fading, they will buzz when the furnace switches on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it may be related to something minor, like a loose screw, or something critical, like a broken part. In either case, we urge you to shut your furnace off and contacting our heating specialists at 715-301-0727 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s making an effort to tell you it could use some TLC. If you’ve skipped furnace maintenance recently, belts could be worn out or a bearing might need to be lubricated. We are aware that maintenance sometimes slips your mind, but our professionals can get your furnace operating quietly again quickly.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s typically due to an air leak in your ductwork. You could also notice whistling while the furnace is operating if a floor vent isn’t tight. If you’ve checked your vents but are still hearing sound, Gilray Heating and Cooling can provide support. It’s important to get loose ductwork repaired without delay, as it can make comfort issues in your home and inflate your utility 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 sound often means there’s trouble with your furnace’s blower. Shut down your furnace off immediately and reach us at 715-301-0727 for help.

When you’re getting an uncommon noise from your furnace, Gilray Heating and Cooling is available to support you. Contact us at 715-301-0727 to schedule your furnace repair appointment today.