When your furnace is operating properly, it should provide heat without creating too much sound. While it’s normal to hear your furnace making noise as it begins running, other noises are showing your furnace needs immediate professional help.

Here are some of the most frequent furnace noises and what they can be indicating. If your furnace is making an atypical noise, our friendly heating pros are here to help with the best furnace repair in Marshalltown, Iowa.

1. Furnace Makes a Banging Sound

You could have a critical issue 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 a couple of problems. These include gas accumulating in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system gets dirty over time, so that’s why it’s critical to book yearly furnace maintenance with B & G HVAC. One of the things our technicians do during this work is clean your furnace’s burners. When this component gets dirty, you might hear your furnace making a loud rumbling noise after ignition takes more time. The resulting gas buildup can fracture your furnace’s heat exchanger, where natural gas turns into warmth. Any cracks in it can emit carbon monoxide, which is ordinarily released outdoors. This dangerous gas can be fatal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, B & G HVAC advises turning it off and reaching us at 641-316-3360. Significant natural gas in your furnace or a cracked heat exchanger are critical problems that require immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to deliver heated air throughout your home. If the ductwork wasn’t put in correctly or is getting old, it can be loud when your furnace is on. This could be the problem if your furnace makes a banging noise when it shuts off. Contact B & G HVAC at 641-316-3360 and we’ll pinpoint the problem.

2. Furnace Makes a Buzzing Sound

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

Your furnace depends on an internal transformer to work on the right voltage. If wires or the box needs to be tightened, you may notice a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves heated or cooled air around your rooms, and a capacitor, which triggers the motor. If either of these components are fading, they will buzz when the furnace starts.

3. Furnace Rattles

If your furnace is making a rattling noise, it can be related to something little, like a loose screw, or something critical, like a broken component. In either case, we advise shutting your furnace off and getting in touch with our heating pros at 641-316-3360 for help.

4. Furnace Squeals

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

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s likely the result of an air leak in your ductwork. You may also hear whistling while the furnace is on if a floor vent isn’t tight. If you’ve examined your vents but are still noticing sound, B & G HVAC can assist you. It’s important to get loose ductwork fixed fast, as it can result in comfort problems in your home and drive up your heating expenses.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not an encouraging sign if you detect your furnace making a grinding noise. This metal-on-metal sound often means there’s a problem with your furnace’s blower. Shut down your furnace off right away and reach our pros at 641-316-3360 for assistance.

When you’re hearing a strange noise from your furnace, B & G HVAC is here to provide assistance. Contact us at 641-316-3360 to schedule your furnace repair appointment now.