When your furnace is working correctly, it should deliver warmth without making too much sound. While it’s normal to catch your furnace making noise as it begins running, other sounds are indicating your furnace needs immediate professional help.

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 pros are here to fix the problem with the best furnace repair in Cedar Rapids, Iowa.

1. Furnace Makes Banging or Knocking Sounds

You might have a critical situation on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it might signal there could be a few problems. These range from gas increasing 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 essential to set routine furnace maintenance with Ilten's. One of the things our pros do during this service is clean your furnace’s burners. When this part gets grubby, you could hear your furnace making a loud rumbling noise if ignition is delayed. The following gas buildup can crack your furnace’s heat exchanger, where natural gas turns into warmth. Any breaks in it can emit carbon monoxide, which is regularly vented away from your home. This dangerous gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Ilten's urges you to turn it off and calling us at 319-208-2351. Too much natural gas in your furnace or a cracked heat exchanger are dangerous troubles that necessitate immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to move hot air across your residence. If the ductwork wasn’t designed properly or is getting dated, it can make a lot of noise when your furnace is heating. This may be the issue if your furnace makes a banging noise when it shuts off. Contact Ilten's at 319-208-2351 and we’ll figure out the problem.

2. Furnace Buzzes Constantly

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

Your furnace depends on an internal transformer to operate on the right voltage. If wires or the box is loose, you may hear a low humming noise in the furnace when off. Your furnace also uses a blower motor, which moves hot or chilly air throughout your house, and a capacitor, which triggers the motor. If either of these parts are going out, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it may be related to something minor, like a loose screw, or something critical, like a broken piece. In either case, we advise shutting your furnace off and getting in touch with our heating professionals at 319-208-2351 for help.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s attempting to get your attention it needs some TLC. If you’ve forgotten furnace maintenance the last couple of years, belts could be worn down or a bearing may need to be greased. We realize that maintenance frequently slips your mind, but our pros can get your furnace heating quietly again quickly.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s typically due to an air leak in your ductwork. You could also notice whistling while the furnace is working if a floor vent isn’t secure. If you’ve looked at your vents but are still noticing sound, Ilten's can assist you. It’s critical to get loose ductwork repaired fast, since it can result in comfort problems in your home and increase your utility bills.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a good sign if you notice your furnace making a grinding noise. This metal-on-metal sound usually means there’s trouble with your furnace’s blower. Shut down your furnace off immediately and call our pros at 319-208-2351 for assistance.

When you’re noticing an uncommon noise from your furnace, Ilten's is available to help. Contact us at 319-208-2351 to book your furnace repair appointment right away.