When your furnace is operating properly, it should give heat without making too much sound. While it’s normal to notice your furnace making noise as it begins running, other disruptions are indicating your furnace requires immediate professional support.

Here are some of the most frequent furnace noises and what they can mean. If your furnace is making a strange noise, our friendly heating professionals are here to assist with the best furnace repair in Middletown, Maryland.

1. Furnace Makes a Banging Sound

You may have a serious problem on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it can mean there could be several problems. These involve gas building up in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system turns filthy over the years, so that’s why it’s important to set annual furnace maintenance with Advanced Service AC & Heating. One of the tasks our techs do during this service is clean your furnace’s burners. When this component gets grubby, you might hear your furnace making a loud rumbling noise when ignition takes longer than normal. The ensuing gas buildup can crack your furnace’s heat exchanger, where natural gas changes into heat. Any cracks in it can discharge carbon monoxide, which is normally emitted outdoors. This dangerous gas can be fatal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Advanced Service AC & Heating recommends turning it off and contacting us at 301-371-8807. Too much natural gas in your furnace or a cracked heat exchanger are critical issues that require fast repairs.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to move hot air around your house. If the ductwork wasn’t installed correctly or is getting old, it can be noisy when your furnace is heating. This can be the issue if your furnace makes a banging noise when it shuts off. Contact Advanced Service AC & Heating at 301-371-8807 and we’ll figure out the problem.

2. Furnace Makes a Buzzing Sound

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

Your furnace uses an internal transformer to operate on the correct voltage. If wires or the box isn’t tight enough, you could notice a low humming noise in the furnace when off. Your furnace also works with a blower motor, which sends warm or cold air across your space, and a capacitor, which turns on the motor. If either of these parts are failing, they will buzz when the furnace switches on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it can be the result of something little, like a loose screw, or something critical, like a broken part. In either case, we advise shutting your furnace off and getting in touch with our heating pros at 301-371-8807 for support.

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 attempting to get your attention it requires some TLC. If you’ve neglected furnace maintenance the last couple of years, belts could be worn out or a bearing might need to be lubed. We realize that maintenance frequently slips your mind, but our technicians can get your furnace heating quietly again quickly.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re detecting your furnace making a whistling noise, it’s frequently due to an air leak in your ductwork. You might also hear whistling while the furnace is running if a floor vent is loose. If you’ve examined your vents but are still sensing noise, Advanced Service AC & Heating can provide support. It’s critical to get loose ductwork repaired without delay, because it can make comfort problems in your house and increase your utility bills.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not an encouraging sign if you hear your furnace making a grinding noise. This metal-on-metal noise frequently means there’s a problem with your furnace’s blower. Turn off your furnace off now and call us at 301-371-8807 for support.

When you’re noticing an uncommon noise from your furnace, Advanced Service AC & Heating is available to provide assistance. Contact us at 301-371-8807 to book your furnace repair appointment now.