When your furnace is running correctly, it should deliver warm air without making too much noise. While it’s expected to hear your furnace making noise as it begins running, other sounds are indicating 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 strange noise, our friendly heating professionals are here to fix the problem with the best furnace repair in Pella, Iowa.

1. Furnace Makes Banging or Knocking Sounds

You could 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 can indicate there could be several problems. These include gas building up in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system turns grimy as time passes, so that’s why it’s important to schedule seasonal furnace maintenance with Van Haaften Plumbing & Heating. One of the tasks our technicians complete during this appointment is clean your furnace’s burners. When this piece gets grubby, you might hear your furnace making a loud rumbling noise after ignition is delayed. The subsequent gas buildup might crack your furnace’s heat exchanger, where natural gas transforms into warm air. Any cracks in it can emit carbon monoxide, which is regularly vented outdoors. This dangerous gas can be lethal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Van Haaften Plumbing & Heating recommends turning it off and reaching us at 641-628-3621. Too much natural gas in your furnace or a cracked heat exchanger are dangerous problems that should get immediate attention.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to deliver hot air around your residence. If the ductwork wasn’t designed right or is getting dated, it can be loud when your furnace is on. This can be the problem if your furnace makes a banging noise when it shuts off. Get in touch with Van Haaften Plumbing & Heating at 641-628-3621 and we’ll determine the problem.

2. Furnace Makes a Buzzing Sound

If you notice your furnace making a buzzing noise, don’t wait to call us. A buzzing sound usually means there’s an electrical problem, 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 moves warm or cooled air throughout your space, and a capacitor, which triggers the motor. If either of these pieces are failing, 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 related to something minor, like an unsecure screw, or something critical, like a broken part. In either case, we recommend shutting off your furnace and getting in touch with our heating professionals at 641-628-3621 for support.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s trying to alert you it requires some TLC. If you’ve neglected furnace maintenance the past few years, belts could be worn down or a bearing may need to be lubricated. We are aware that maintenance sometimes slips your mind, but our technicians can get your furnace operating quietly again fast.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re noticing your furnace making a whistling noise, it’s likely due to an air leak in your ductwork. You may also hear whistling while the furnace is operating if a floor vent is loose. If you’ve examined your vents but are still hearing sound, Van Haaften Plumbing & Heating can assist you. It’s important to get loose ductwork taken care of quickly, as it can result in comfort problems in your residence and drive up your gas costs.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not an encouraging sign if you detect your furnace making a grinding noise. This metal-on-metal noise frequently means there’s an issue with your furnace’s blower. Turn off your furnace off right away and reach our pros at 641-628-3621 for assistance.

When you’re noticing a strange noise from your furnace, Van Haaften Plumbing & Heating is available to support you. Contact us at 641-628-3621 to request your furnace repair appointment right away.