When your furnace is operating like it should, it should give warm air without making too much noise. While it’s normal to hear your furnace making noise as it starts up, other disruptions are signaling your furnace needs immediate professional support.

Here are some of the most reported furnace noises and what they can mean. If your furnace is making an odd noise, our friendly heating specialists are here to fix the problem with the best furnace repair in York, Pennsylvania.

1. Furnace Making a Banging Noise

You may have an urgent situation on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it might signal there could be a couple of problems. These involve gas building up in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system turns grimy over time, so that’s why it’s important to schedule yearly furnace maintenance with Strine's. One of the jobs our technicians do during this work is clean your furnace’s burners. When this piece gets grubby, you might hear your furnace making a loud rumbling noise when ignition takes longer than normal. The following gas buildup might fracture your furnace’s heat exchanger, where natural gas transforms into warm air. Any cracks in it can leak carbon monoxide, which is regularly vented outside. This dangerous gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Strine's recommends turning it off and contacting us at 717-383-4479. Excessive natural gas in your furnace or a ruptured heat exchanger are critical troubles that necessitate immediate attention.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to deliver heated air throughout your house. If the ductwork wasn’t put in properly or is getting old, it can be noisy when your furnace runs. This could be the issue if your furnace makes a banging noise when it shuts off. Call Strine's at 717-383-4479 and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

If you observe your furnace making a buzzing noise, don’t wait to call us. A buzzing sound often means there’s an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to operate on the right voltage. If wires or the box isn’t tight enough, you may hear a low humming noise in the furnace when off. Your furnace also has a blower motor, which moves warm or chilly air throughout your space, and a capacitor, which triggers the motor. If either of these components are failing, they will buzz when the furnace turns on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it may be due to something little, like a loose screw, or something serious, like a broken piece. In either case, we advise shutting your furnace off and contacting our heating specialists at 717-383-4479 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s trying to get your attention it could use some TLC. If you’ve neglected furnace maintenance the last couple of years, belts could be worn down or a bearing may need to be greased. We realize that maintenance sometimes slips your mind, but our techs can get your furnace heating quietly again quickly.

5. Furnace Making a Whistling Noise

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 on if a floor vent isn’t tight. If you’ve looked at your vents but are still sensing noise, Strine's can assist you. It’s critical to get loose ductwork repaired without delay, since it can create comfort problems in your house and inflate your utility expenses.

6. Furnace Making a Grinding Noise

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal noise usually means there’s trouble with your furnace’s blower. Turn off your furnace off now and call our professionals at 717-383-4479 for assistance.

When you’re hearing an atypical noise from your furnace, Strine's is available to help. Contact us at 717-383-4479 to request your furnace repair appointment right away.