When your furnace is running like it should, it should deliver heat without making too much sound. While it’s common to notice 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 pros are here to assist with the best furnace repair in Cedar Rapids, Iowa.

1. Furnace Makes a Banging Sound

You may have an urgent situation on your hands if you’re detecting 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 increasing in your furnace or a ductwork situation.

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 Ilten's. One of the tasks our techs perform during this work is clean your furnace’s burners. When this part gets grubby, you could hear your furnace making a loud rumbling noise when ignition takes longer than normal. The resulting gas buildup can crack your furnace’s heat exchanger, where natural gas changes into warm air. Any breaks in it can leak carbon monoxide, which is normally vented outdoors. This toxic gas can be deadly in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Ilten's advises turning it off and contacting us at 319-208-2351. Excessive natural gas in your furnace or a fractured heat exchanger are dangerous troubles that should get immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to move hot air across your house. If the ductwork wasn’t installed right or is aging, it can be noisy when your furnace is heating. This may be the problem if your furnace makes a banging noise when it shuts off. Call Ilten's at 319-208-2351 and we’ll determine the problem.

2. Furnace Buzzes Constantly

If you notice your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound frequently indicates an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace uses an internal transformer to run on the right voltage. If wires or the box isn’t tight enough, you may notice a low humming noise in the furnace when off. Your furnace also works with a blower motor, which sends warm or chilly air across your home, and a capacitor, which turns on 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 due to something small, like an unfastened screw, or something critical, like a broken piece. In either case, we recommend shutting off your furnace and getting in touch with our heating pros at 319-208-2351 for support.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s trying to get your attention it needs some TLC. If you’ve forgotten furnace maintenance recently, belts could be worn out or a bearing could need to be lubed. We know that maintenance sometimes slips your mind, but our techs can get your furnace operating quietly again rapidly.

5. Furnace Whistles

When you’re noticing your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You might also be aware of whistling while the furnace is working if a floor vent isn’t secure. If you’ve looked at your vents but are still sensing whistling, Ilten's can assist you. It’s important to get loose ductwork fixed without delay, since it can make comfort problems in your house and drive up your heating 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 sound usually means there’s trouble with your furnace’s blower. Turn off your furnace off right away and call our professionals at 319-208-2351 for assistance.

When you’re getting a strange noise from your furnace, Ilten's is available to provide assistance. Contact us at 319-208-2351 to schedule your furnace repair appointment now.