When your furnace is running correctly, it should deliver heat without generating too much sound. While it’s common to notice your furnace making noise as it starts up, other noises are indicating your furnace requires immediate professional assistance.

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

1. Furnace Making a Banging Noise

You may have an urgent problem on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it might indicate there could be several problems. These involve gas building up in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system becomes dirty over time, so that’s why it’s critical to book seasonal furnace maintenance with Kapaun & Brown. One of the tasks our technicians do during this appointment is clean your furnace’s burners. When this piece gets grimy, you could hear your furnace making a loud rumbling noise if ignition is delayed. The following gas buildup may fracture your furnace’s heat exchanger, where natural gas transforms into warmth. Any fractures in it can leak carbon monoxide, which is normally vented outdoors. This toxic gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Kapaun & Brown urges you to turn it off and calling us at 641-812-2028. Significant natural gas in your furnace or a fractured heat exchanger are critical issues that should get immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to deliver heated air around your house. If the ductwork wasn’t designed properly or is aging, it can make a lot of noise when your furnace is heating. This could be the issue if your furnace makes a banging noise when it shuts off. Call Kapaun & Brown at 641-812-2028 and we’ll figure out the problem.

2. Furnace Buzzes Constantly

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

Your furnace uses an internal transformer to run on the correct voltage. If wires or the box is loose, you could detect a low humming noise in the furnace when off. Your furnace also has a blower motor, which distributes hot or chilly air across your home, and a capacitor, which starts the motor. If either of these components are fading, they will buzz when the furnace starts.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it could be the result of something little, like an unsecure screw, or something major, like a broken part. In either case, we recommend shutting off your furnace and contacting our heating pros at 641-812-2028 for support.

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 trying to alert you it requires some TLC. If you’ve skipped furnace maintenance the past few years, belts could be worn out or a bearing might need to be lubed. We realize that maintenance sometimes slips your mind, but our techs can get your furnace running quietly again quickly.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re noticing your furnace making a whistling noise, it’s typically the result of an air leak in your ductwork. You could also be aware of whistling while the furnace is working if a floor vent isn’t tight. If you’ve checked your vents but are still hearing noise, Kapaun & Brown can provide support. It’s critical to get loose ductwork fixed without delay, since it can result in comfort issues in your house and drive up your gas costs.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a positive sign if you hear your furnace making a grinding noise. This metal-on-metal noise usually means there’s trouble with your furnace’s blower. Switch off your furnace off now and contact our professionals at 641-812-2028 for help.

When you’re hearing a weird noise from your furnace, Kapaun & Brown is available to provide assistance. Contact us at 641-812-2028 to schedule your furnace repair appointment today.