When your furnace is running like it should, it should give warmth without making too much disruption. While it’s normal to catch your furnace making noise as it turns on, other noises are showing your furnace should get immediate professional assistance.

Here are some of the most reported furnace noises and what they can mean. If your furnace is making an odd noise, our friendly heating pros are here to help with the best furnace repair in Des Moines, Iowa.

1. Furnace Makes a Banging Sound

You might have a serious issue on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it may mean there could be a few problems. These involve gas accumulating in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system gets grimy over the years, so that’s why it’s important to schedule seasonal furnace maintenance with Kohles & Bach Heating & Cooling. One of the tasks our technicians perform during this appointment is clean your furnace’s burners. When this part gets dirty, you could hear your furnace making a loud rumbling noise if ignition takes longer than normal. The resulting gas buildup might break your furnace’s heat exchanger, where natural gas transforms into warm air. Any fractures in it can discharge carbon monoxide, which is regularly released outdoors. This dangerous gas can be fatal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Kohles & Bach Heating & Cooling advises turning it off and contacting us at 515-278-2900. Excessive natural gas in your furnace or a fractured heat exchanger are critical issues that should get immediate attention.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to move heated air throughout your house. If the ductwork wasn’t designed properly or is aging, it can make a lot of noise when your furnace is on. This might be the issue if your furnace makes a banging noise when it shuts off. Get in touch with Kohles & Bach Heating & Cooling at 515-278-2900 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

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

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

3. Furnace Rattles

If your furnace is making a rattling noise, it could be the result of something minor, like an unfastened screw, or something critical, like a broken piece. In either case, we recommend shutting off your furnace and calling our heating professionals at 515-278-2900 for support.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s attempting to get your attention it requires some TLC. If you’ve forgotten furnace maintenance the last couple of years, belts could be worn out or a bearing could need to be greased. We know that maintenance sometimes slips your mind, but our technicians can get your furnace operating quietly again quickly.

5. Furnace Whistles

When you’re noticing your furnace making a whistling noise, it’s frequently due to an air leak in your ductwork. You may also be aware of whistling while the furnace is on if a floor vent isn’t tight. If you’ve looked at your vents but are still hearing whistling, Kohles & Bach Heating & Cooling can assist you. It’s important to get loose ductwork fixed fast, since it can create comfort troubles in your house and drive up your heating costs.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal racket typically means there’s a problem with your furnace’s blower. Turn off your furnace off instantly and contact us at 515-278-2900 for assistance.

When you’re getting a weird noise from your furnace, Kohles & Bach Heating & Cooling is available to provide assistance. Contact us at 515-278-2900 to schedule your furnace repair appointment right away.