When your furnace is running properly, it should deliver warm air without making too much disruption. While it’s normal to hear your furnace making noise as it begins running, other sounds are indicating your furnace should get immediate professional help.

Here are some of the most reported furnace noises and what they could be signaling. If your furnace is making a strange noise, our friendly heating professionals are here to help with the best furnace repair in Mobile, Alabama.

1. Furnace Makes a Banging Sound

You might have a serious problem on your hands if you’re noticing 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 increasing in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system turns dirty as time passes, so that’s why it’s essential to schedule routine furnace maintenance with Farnell Heating & Air Conditioning Inc. One of the jobs our professionals 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 after ignition takes more time. The ensuing gas buildup may break your furnace’s heat exchanger, where natural gas changes into heat. Any fractures in it can emit carbon monoxide, which is normally emitted outside. This hazardous gas can be fatal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Farnell Heating & Air Conditioning Inc recommends turning it off and calling us at 251-471-2674. Excessive natural gas in your furnace or a fractured heat exchanger are dangerous problems that necessitate immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide heated air across your home. If the ductwork wasn’t designed right or is getting dated, it can be loud when your furnace is on. This may be the issue if your furnace makes a banging noise when it shuts off. Get in touch with Farnell Heating & Air Conditioning Inc at 251-471-2674 and we’ll determine the problem.

2. Furnace Makes a Buzzing Sound

If you hear your furnace making a buzzing noise, don’t hesitate 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 work on the correct voltage. If wires or the box needs to be tightened, you might notice a low humming noise in the furnace when off. Your furnace also has a blower motor, which sends warm or cooled air throughout your house, and a capacitor, which triggers the motor. If either of these pieces are failing, they will buzz when the furnace turns on.

3. Furnace Rattles

If your furnace is making a rattling noise, it can be the result of something small, like a loose screw, or something critical, like a broken component. In either case, we advise shutting your furnace off and contacting our heating pros at 251-471-2674 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s making an effort to alert you it requires some TLC. If you’ve neglected furnace maintenance recently, belts could be worn down or a bearing could need to be greased. We realize that maintenance often slips your mind, but our pros can get your furnace running quietly again fast.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s frequently because of an air leak in your ductwork. You might also hear whistling while the furnace is on if a floor vent isn’t tight. If you’ve examined your vents but are still hearing sound, Farnell Heating & Air Conditioning Inc can assist you. It’s important to get loose ductwork repaired fast, since it can create comfort issues in your home and drive up your energy costs.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not an encouraging sign if you notice your furnace making a grinding noise. This metal-on-metal racket often means there’s trouble with your furnace’s blower. Switch off your furnace off promptly and call our pros at 251-471-2674 for help.

When you’re getting a weird noise from your furnace, Farnell Heating & Air Conditioning Inc is available to support you. Contact us at 251-471-2674 to schedule your furnace repair appointment today.