When your furnace is running properly, it should deliver warm air without creating too much noise. While it’s common to catch your furnace making noise as it turns on, other sounds are signaling your furnace needs immediate professional assistance.

Here are some of the most frequent furnace noises and what they could be indicating. 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 could have a critical situation 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 range from gas building up in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system turns filthy over the years, so that’s why it’s important to schedule seasonal furnace maintenance with Kapaun & Brown. One of the jobs our pros do during this appointment is clean your furnace’s burners. When this piece gets dirty, you could hear your furnace making a loud rumbling noise if ignition takes longer than normal. The ensuing gas buildup may fracture your furnace’s heat exchanger, where natural gas changes into heat. Any cracks in it can leak carbon monoxide, which is regularly released outdoors. This hazardous gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Kapaun & Brown recommends turning it off and calling us at 641-812-2028. Too much natural gas in your furnace or a cracked heat exchanger are hazardous problems that require immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide hot air around your residence. If the ductwork wasn’t designed properly or is aging, it can be loud when your furnace runs. This can be the problem 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 Making a Buzzing Noise

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

Your furnace uses an internal transformer to operate on the right voltage. If wires or the box isn’t tight enough, you may detect a low humming noise in the furnace when off. Your furnace also uses a blower motor, which distributes hot or cooled air around your rooms, and a capacitor, which starts the motor. If either of these parts are fading, they will buzz when the furnace turns on.

3. Furnace Rattles

If your furnace is making a rattling noise, it could be due to something minor, like an unsecure screw, or something serious, like a broken component. In either case, we recommend shutting off your furnace and getting in touch with our heating pros at 641-812-2028 for help.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s making an effort to get your attention it could use some TLC. If you’ve forgotten furnace maintenance the past few years, belts could be worn down or a bearing could need to be greased. We know that maintenance sometimes slips your mind, but our pros can get your furnace heating quietly again rapidly.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re noticing your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You might also notice whistling while the furnace is running if a floor vent isn’t secure. If you’ve looked at your vents but are still sensing sound, Kapaun & Brown can provide support. It’s essential to get loose ductwork repaired quickly, since it can create comfort troubles in your house and inflate your utility 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 an issue with your furnace’s blower. Turn off your furnace off immediately and call our professionals at 641-812-2028 for help.

When you’re noticing an atypical noise from your furnace, Kapaun & Brown is available to support you. Contact us at 641-812-2028 to schedule your furnace repair appointment now.