When your furnace is working properly, it should give heat without generating too much sound. While it’s expected to notice your furnace making noise as it starts up, other sounds are showing your furnace needs immediate professional support.

Here are some of the most reported furnace noises and what they might be signaling. If your furnace is making an odd noise, our friendly heating specialists are here to help with the best furnace repair in Jefferson, Wisconsin.

1. Furnace Makes a Banging Sound

You may have a critical issue on your hands if you’re hearing 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 include gas building up in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system turns dirty over the years, so that’s why it’s critical to book yearly furnace maintenance with Pratt Brothers. One of the things our technicians complete during this work is clean your furnace’s burners. When this component gets grimy, you could hear your furnace making a loud rumbling noise after ignition is delayed. The following gas buildup can fracture your furnace’s heat exchanger, where natural gas turns into warmth. Any breaks in it can leak carbon monoxide, which is ordinarily vented outdoors. This toxic gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Pratt Brothers urges you to turn it off and reaching us at 920-347-8495. Too much natural gas in your furnace or a broken heat exchanger are critical troubles that require fast repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide hot air around your house. If the ductwork wasn’t designed right or is getting dated, it can be loud when your furnace is heating. This might be the case if your furnace makes a banging noise when it shuts off. Contact Pratt Brothers at 920-347-8495 and we’ll determine the problem.

2. Furnace Making a Buzzing Noise

If you observe your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound often means there’s an electrical issue, 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 could notice a low humming noise in the furnace when off. Your furnace also uses a blower motor, which moves hot or cooled air around your rooms, and a capacitor, which turns on the motor. If either of these pieces are going out, they will buzz when the furnace switches on.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it can be related to something minor, like an unfastened screw, or something serious, like a broken part. In either case, we recommend shutting off your furnace and getting in touch with our heating specialists at 920-347-8495 for assistance.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s attempting to get your attention it needs some TLC. If you’ve forgotten furnace maintenance the last couple of years, belts could be worn out or a bearing might need to be lubricated. We are aware that maintenance often slips your mind, but our technicians can get your furnace operating quietly again quickly.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re noticing your furnace making a whistling noise, it’s likely the result of an air leak in your ductwork. You may also hear whistling while the furnace is operating if a floor vent isn’t secure. If you’ve looked at your vents but are still sensing sound, Pratt Brothers can help. It’s essential to get loose ductwork taken care of without delay, as it can result in comfort problems in your home and increase your utility bills.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a positive sign if you detect your furnace making a grinding noise. This metal-on-metal noise frequently means there’s trouble with your furnace’s blower. Shut down your furnace off instantly and call our pros at 920-347-8495 for support.

When you’re getting a weird noise from your furnace, Pratt Brothers is available to support you. Contact us at 920-347-8495 to request your furnace repair appointment now.