Banging, Screeching and Rattling: What 6 Common Furnace Noises Indicate

October 13, 2020

When your furnace is working correctly, it should provide heat without creating too much noise. While it’s common to hear your furnace making noise as it turns on, other noises are indicating your furnace needs immediate professional support.

Here are some of the most frequent furnace noises and what they could be indicating. If your furnace is making a weird noise, our friendly heating pros are here to assist with the best furnace repair in Huntingburg, IN.

1. Furnace Making a Banging Noise

You may have a serious situation on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it might mean there could be a couple of problems. These include gas building up in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system becomes dirty as time passes, so that’s why it’s critical to schedule routine furnace maintenance with Dearing's Service & Solutions. One of the things our technicians do during this appointment is clean your furnace’s burners. When this part gets grimy, you could hear your furnace making a loud rumbling noise after ignition takes more time. The following gas buildup may fracture your furnace’s heat exchanger, where natural gas transforms into warmth. Any breaks in it can discharge carbon monoxide, which is normally released outdoors. This hazardous gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Dearing's Service & Solutions advises turning it off and reaching us at 812-200-5844. Significant natural gas in your furnace or a ruptured heat exchanger are dangerous troubles that necessitate fast attention.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide heated air around your residence. If the ductwork wasn’t designed correctly or is aging, it can be loud when your furnace is heating. This can be the issue if your furnace makes a banging noise when it shuts off. Contact Dearing's Service & Solutions at 812-200-5844 and we’ll figure out 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 often is telling you there’s an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to run on the correct voltage. If wires or the box isn’t tight enough, you could hear a low humming noise in the furnace when off. Your furnace also has a blower motor, which distributes heated or cooled air throughout your residence, and a capacitor, which turns on the motor. If either of these pieces are going out, they will buzz when the furnace turns on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it could be related to something small, like an unsecure screw, or something critical, like a broken piece. In either case, we recommend shutting off your furnace and getting in touch with our heating pros at 812-200-5844 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s making an effort to alert you it requires some TLC. If you’ve skipped furnace maintenance the last couple of years, belts could be dilapidated or a bearing could need to be lubricated. We know that maintenance frequently slips your mind, but our technicians can get your furnace heating 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 might also be aware of whistling while the furnace is working if a floor vent is loose. If you’ve examined your vents but are still sensing sound, Dearing's Service & Solutions can help. It’s essential to get loose ductwork fixed fast, because it can make comfort problems in your house and increase your utility expenses.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you detect your furnace making a grinding noise. This metal-on-metal racket usually means there’s trouble with your furnace’s blower. Turn off your furnace off right away and contact us at 812-200-5844 for support.

When you’re hearing an uncommon noise from your furnace, Dearing's Service & Solutions is ready to support you. Contact us at 812-200-5844 to request your furnace repair appointment today.