When your furnace is working like it should, it should provide heat without generating too much noise. While it’s expected to catch your furnace making noise as it starts up, other sounds are signaling your furnace should get immediate professional help.

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

1. Furnace Makes Banging or Knocking Sounds

You might have a critical situation on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it may indicate there could be a few problems. These range from gas increasing 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 important to book seasonal furnace maintenance with Strine's. One of the tasks our pros do during this service is clean your furnace’s burners. When this piece gets grimy, you could hear your furnace making a loud rumbling noise when ignition is delayed. The ensuing gas buildup might break your furnace’s heat exchanger, where natural gas changes into warmth. Any fractures in it can leak carbon monoxide, which is regularly emitted away from your home. This toxic gas can be lethal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Strine's recommends turning it off and calling us at 717-383-4479. Excessive natural gas in your furnace or a fractured heat exchanger are critical issues that should get prompt attention.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide warm air throughout your residence. If the ductwork wasn’t installed properly or is aging, it can be noisy when your furnace is on. This could be the problem if your furnace makes a banging noise when it shuts off. Contact Strine's at 717-383-4479 and we’ll determine 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 depends on an internal transformer to work on the proper voltage. If wires or the box isn’t tight enough, you might hear a low humming noise in the furnace when off. Your furnace also has a blower motor, which sends hot or chilly air across your residence, and a capacitor, which turns on the motor. If either of these components are fading, they will buzz when the furnace starts.

3. Furnace Rattles

If your furnace is making a rattling noise, it may be due to something minor, like a loose screw, or something critical, like a broken part. In either case, we recommend shutting off your furnace and calling our heating specialists at 717-383-4479 for support.

4. Furnace Making a Squealing Noise

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

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re noticing your furnace making a whistling noise, it’s frequently because of an air leak in your ductwork. You could also hear whistling while the furnace is running if a floor vent is loose. If you’ve checked your vents but are still sensing whistling, Strine's can help. It’s critical to get loose ductwork repaired quickly, since it can result in comfort issues in your house and increase your heating bills.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a good sign if you notice your furnace making a grinding noise. This metal-on-metal noise frequently means there’s a problem with your furnace’s blower. Shut down your furnace off right away and call our pros at 717-383-4479 for help.

When you’re getting an uncommon noise from your furnace, Strine's is available to support you. Contact us at 717-383-4479 to request your furnace repair appointment now.