When your furnace is operating properly, it should deliver heat without generating too much noise. While it’s expected to catch your furnace making noise as it turns on, other disruptions are showing 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 Marshalltown, Iowa.

1. Furnace Making a Banging Noise

You might have a critical situation 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 several problems. These range from gas building up in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system gets grimy as time passes, so that’s why it’s important to set yearly furnace maintenance with Kapaun & Brown. One of the tasks our professionals perform during this appointment is clean your furnace’s burners. When this part gets grimy, you might hear your furnace making a loud rumbling noise after ignition takes longer than normal. The following gas buildup can fracture your furnace’s heat exchanger, where natural gas transforms into warm air. Any cracks in it can leak carbon monoxide, which is normally released outside. This dangerous gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Kapaun & Brown urges you to turn it off and contacting us at 641-812-2028. Significant natural gas in your furnace or a broken heat exchanger are critical troubles that necessitate immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to move heated air throughout your house. If the ductwork wasn’t put in properly or is getting old, it can make a lot of noise when your furnace is on. This may be the case if your furnace makes a banging noise when it shuts off. Contact Kapaun & Brown at 641-812-2028 and we’ll determine the problem.

2. Furnace Buzzes Constantly

If you hear your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound typically is telling you there’s an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to operate on the right voltage. If wires or the box isn’t tight enough, you might hear a low humming noise in the furnace when off. Your furnace also has a blower motor, which distributes warm or cooled air throughout your space, and a capacitor, which starts the motor. If either of these components are fading, they will buzz when the furnace turns on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it can be due to something small, like a loose screw, or something critical, like a broken component. In either case, we recommend shutting off your furnace and calling our heating specialists at 641-812-2028 for assistance.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s trying to tell you it needs some TLC. If you’ve neglected furnace maintenance the last couple of years, belts could be worn down or a bearing could need to be lubed. We realize that maintenance sometimes slips your mind, but our pros can get your furnace heating quietly again fast.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s likely due to an air leak in your ductwork. You could also be aware of whistling while the furnace is running if a floor vent is loose. If you’ve checked your vents but are still hearing sound, Kapaun & Brown can provide support. It’s critical to get loose ductwork repaired without delay, as it can result in comfort issues in your home and drive up your gas bills.

6. Furnace Making a Grinding Noise

It’s not a good sign if you notice your furnace making a grinding noise. This metal-on-metal noise often means there’s a problem with your furnace’s blower. Turn off your furnace off immediately and reach us at 641-812-2028 for assistance.

When you’re getting an uncommon noise from your furnace, Kapaun & Brown is ready to support you. Contact us at 641-812-2028 to request your furnace repair appointment today.