When your furnace is working correctly, it should deliver heat without creating too much noise. While it’s expected to hear your furnace making noise as it begins running, other sounds are signaling your furnace should get immediate professional assistance.

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

1. Furnace Makes Banging or Knocking Sounds

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 can mean there could be a couple of problems. These involve gas increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system gets filthy over the years, so that’s why it’s important to schedule seasonal furnace maintenance with H&C Heating and Cooling. One of the things our techs do during this service is clean your furnace’s burners. When this piece gets grubby, you might hear your furnace making a loud rumbling noise after ignition is delayed. The ensuing gas buildup may break your furnace’s heat exchanger, where natural gas changes into warmth. Any fractures in it can emit carbon monoxide, which is regularly vented outside. This hazardous gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, H&C Heating and Cooling recommends turning it off and reaching us at 301-960-3247. Excessive natural gas in your furnace or a ruptured heat exchanger are critical troubles that require prompt service.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to deliver warm air around your home. If the ductwork wasn’t installed properly or is aging, it can be noisy when your furnace is heating. This may be the problem if your furnace makes a banging noise when it shuts off. Call H&C Heating and Cooling at 301-960-3247 and we’ll determine the problem.

2. Furnace Making a Buzzing Noise

If you notice your furnace making a buzzing noise, don’t delay calling us. A buzzing sound usually means there’s an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to run on the proper voltage. If wires or the box is loose, you may notice a low humming noise in the furnace when off. Your furnace also works with a blower motor, which sends heated or cold air across your house, and a capacitor, which starts the motor. If either of these parts are failing, they will buzz when the furnace switches on.

3. Furnace Rattles

If your furnace is making a rattling noise, it could be the result of something minor, like a loose screw, or something serious, like a broken part. In either case, we recommend shutting off your furnace and getting in touch with our heating specialists at 301-960-3247 for help.

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 tell you it needs some TLC. If you’ve neglected furnace maintenance the last couple of years, belts could be worn down or a bearing might need to be greased. We are aware that maintenance frequently slips your mind, but our techs can get your furnace operating quietly again rapidly.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re noticing your furnace making a whistling noise, it’s typically the result of an air leak in your ductwork. You could also hear whistling while the furnace is operating if a floor vent isn’t tight. If you’ve checked your vents but are still noticing whistling, H&C Heating and Cooling can provide support. It’s essential to get loose ductwork fixed fast, since it can make comfort issues in your home and inflate your utility costs.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a good sign if you hear your furnace making a grinding noise. This metal-on-metal noise usually means there’s trouble with your furnace’s blower. Switch off your furnace off promptly and reach us at 301-960-3247 for support.

When you’re getting an atypical 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.