When your furnace is working like it should, it should deliver warmth without creating too much disruption. While it’s normal to hear your furnace making noise as it starts up, other noises are signaling your furnace should get immediate professional help.

Here are some of the most reported furnace noises and what they can be indicating. If your furnace is making a weird noise, our friendly heating specialists are here to assist with the best furnace repair in Des Moines, Iowa.

1. Furnace Makes a Banging Sound

You might have an urgent situation on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it can indicate there could be several problems. These involve gas building up 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 schedule routine furnace maintenance with Kohles & Bach Heating & Cooling. One of the jobs our pros perform during this appointment is clean your furnace’s burners. When this part gets dirty, you could hear your furnace making a loud rumbling noise if ignition takes more time. The following gas buildup can break your furnace’s heat exchanger, where natural gas turns into warm air. Any cracks in it can leak carbon monoxide, which is regularly emitted outside. This dangerous gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Kohles & Bach Heating & Cooling advises turning it off and reaching us at 515-207-6569. Excessive natural gas in your furnace or a cracked heat exchanger are critical issues that necessitate fast repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide hot air across your house. If the ductwork wasn’t installed properly or is getting dated, it can be loud when your furnace is heating. This may be the problem if your furnace makes a banging noise when it shuts off. Contact Kohles & Bach Heating & Cooling at 515-207-6569 and we’ll determine the problem.

2. Furnace Makes a Buzzing Sound

If you hear your furnace making a buzzing noise, don’t wait to call us. A buzzing sound typically indicates an electrical problem, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to run on the right 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 sends hot or cold air across your house, and a capacitor, which triggers the motor. If either of these components are failing, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it can be due to something small, like an unfastened screw, or something critical, like a broken piece. In either case, we urge you to shut your furnace off and contacting our heating specialists at 515-207-6569 for help.

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 making an effort to alert you it requires some TLC. If you’ve neglected furnace maintenance the last couple of years, belts could be worn out or a bearing may need to be lubed. We are aware that maintenance often slips your mind, but our pros can get your furnace heating quietly again fast.

5. Furnace Whistles

When you’re detecting your furnace making a whistling noise, it’s typically 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 examined your vents but are still hearing sound, Kohles & Bach Heating & Cooling can provide support. It’s essential to get loose ductwork taken care of quickly, since it can create comfort issues in your home and drive up your energy bills.

6. Furnace Making a Grinding Noise

It’s not a positive sign if you hear your furnace making a grinding noise. This metal-on-metal racket frequently means there’s an issue with your furnace’s blower. Switch off your furnace off immediately and call us at 515-207-6569 for assistance.

When you’re hearing a weird noise from your furnace, Kohles & Bach Heating & Cooling is here to support you. Contact us at 515-207-6569 to schedule your furnace repair appointment today.