When your furnace is working correctly, it should give warm air without making too much sound. While it’s expected to notice your furnace making noise as it begins running, other noises are indicating your furnace requires immediate professional help.

Here are some of the most common furnace noises and what they could be signaling. If your furnace is making an atypical noise, our friendly heating professionals are here to assist with the best furnace repair in Laurel, Maryland.

1. Furnace Making a Banging Noise

You might have a critical situation on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it may indicate there could be a few problems. These include gas increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system gets dirty over the years, so that’s why it’s critical to book yearly furnace maintenance with H&C Heating and Cooling. One of the tasks our technicians complete during this appointment is clean your furnace’s burners. When this piece gets dirty, you may hear your furnace making a loud rumbling noise when ignition is delayed. The subsequent gas buildup may crack your furnace’s heat exchanger, where natural gas transforms into warm air. Any cracks in it can emit carbon monoxide, which is ordinarily released away from your home. This hazardous gas can be fatal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, H&C Heating and Cooling recommends turning it off and reaching us at 301-960-3247. Significant natural gas in your furnace or a cracked heat exchanger are hazardous issues that necessitate fast attention.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to move hot air throughout your residence. If the ductwork wasn’t installed right or is getting old, it can be loud when your furnace is heating. This could be the issue if your furnace makes a banging noise when it shuts off. Get in touch with H&C Heating and Cooling at 301-960-3247 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

If you notice your furnace making a buzzing noise, don’t wait to call us. A buzzing sound usually indicates an electrical problem, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to work on the proper voltage. If wires or the box is loose, you could hear a low humming noise in the furnace when off. Your furnace also uses a blower motor, which sends heated or chilly air throughout your home, and a capacitor, which turns on the motor. If either of these parts are going out, 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 unfastened screw, or something serious, like a broken component. In either case, we recommend shutting off your furnace and getting in touch with our heating professionals at 301-960-3247 for assistance.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s attempting to tell you it could use some TLC. If you’ve skipped furnace maintenance recently, belts could be worn out or a bearing might need to be greased. We realize that maintenance frequently slips your mind, but our techs can get your furnace heating quietly again fast.

5. Furnace Whistles

When you’re hearing your furnace making a whistling noise, it’s typically due to an air leak in your ductwork. You could also notice whistling while the furnace is running if a floor vent isn’t tight. If you’ve examined your vents but are still noticing sound, H&C Heating and Cooling can help. It’s important to get loose ductwork repaired without delay, because it can result in comfort issues in your residence and drive up your energy expenses.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not an encouraging sign if you detect your furnace making a grinding noise. This metal-on-metal racket frequently means there’s a problem with your furnace’s blower. Shut down your furnace off now and contact us at 301-960-3247 for assistance.

When you’re hearing a weird noise from your furnace, H&C Heating and Cooling is here to provide assistance. Contact us at 301-960-3247 to request your furnace repair appointment right away.