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

Here are some of the most common furnace noises and what they could be signaling. If your furnace is making a weird noise, our friendly heating pros are here to fix the problem with the best furnace repair in Cambridge, Maryland.

1. Furnace Makes a Banging Sound

You might have a critical problem on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it might indicate there could be a couple of problems. These involve gas accumulating in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system gets grimy over the years, so that’s why it’s essential to set seasonal furnace maintenance with Pliescott HVAC Services LLC. One of the tasks our professionals do during this work is clean your furnace’s burners. When this part gets grimy, you might hear your furnace making a loud rumbling noise when ignition takes more time. The subsequent gas buildup may break your furnace’s heat exchanger, where natural gas transforms into heat. Any fractures in it can leak carbon monoxide, which is ordinarily vented outside. This dangerous gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Pliescott HVAC Services LLC advises turning it off and calling us at 410-228-4822. Too much natural gas in your furnace or a cracked heat exchanger are hazardous issues that should get immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to deliver warm air around your house. If the ductwork wasn’t designed correctly or is aging, it can be loud when your furnace runs. This could be the issue if your furnace makes a banging noise when it shuts off. Contact Pliescott HVAC Services LLC at 410-228-4822 and we’ll determine the problem.

2. Furnace Buzzes Constantly

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

Your furnace depends on an internal transformer to work on the right voltage. If wires or the box is loose, you could hear a low humming noise in the furnace when off. Your furnace also has a blower motor, which sends heated or cold air throughout your space, and a capacitor, which starts the motor. If either of these pieces are going out, they will buzz when the furnace switches on.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it can be the result of something minor, like a loose screw, or something critical, like a broken component. In either case, we recommend shutting off your furnace and getting in touch with our heating pros at 410-228-4822 for support.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s attempting to get your attention it could use some TLC. If you’ve forgotten furnace maintenance the past few years, belts could be worn down or a bearing could need to be greased. We know that maintenance often slips your mind, but our techs can get your furnace heating quietly again fast.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re hearing your furnace making a whistling noise, it’s typically the result of an air leak in your ductwork. You could also notice whistling while the furnace is running if a floor vent is loose. If you’ve examined your vents but are still noticing whistling, Pliescott HVAC Services LLC can help. It’s important to get loose ductwork taken care of without delay, because it can create comfort issues in your home and inflate your gas expenses.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you detect your furnace making a grinding noise. This metal-on-metal sound often means there’s trouble with your furnace’s blower. Turn off your furnace off right away and contact our professionals at 410-228-4822 for help.

When you’re getting an uncommon noise from your furnace, Pliescott HVAC Services LLC is here to help. Contact us at 410-228-4822 to request your furnace repair appointment now.