When your furnace is running correctly, it should deliver heat without creating too much sound. While it’s expected to catch your furnace making noise as it turns on, other sounds are showing your furnace needs immediate professional support.

Here are some of the most reported furnace noises and what they might be indicating. If your furnace is making a weird noise, our friendly heating professionals are here to fix the problem with the best furnace repair in Greater Richmond, Virginia.

1. Furnace Makes Banging or Knocking Sounds

You might 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 can 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 gets filthy over the years, so that’s why it’s important to set seasonal furnace maintenance with Herman Allen Plumbing, Heating & Cooling. One of the jobs our techs complete during this service is clean your furnace’s burners. When this component gets dirty, you might 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 changes into heat. Any fractures 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 hearing banging or knocking sounds coming from your furnace, Herman Allen Plumbing, Heating & Cooling urges you to turn it off and reaching us at 804-302-6657. Significant natural gas in your furnace or a fractured heat exchanger are dangerous issues that should get fast attention.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to move heated air across your home. If the ductwork wasn’t designed right or is getting dated, it can be loud when your furnace is on. This can be the issue if your furnace makes a banging noise when it shuts off. Contact Herman Allen Plumbing, Heating & Cooling at 804-302-6657 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

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

Your furnace uses an internal transformer to work on the correct voltage. If wires or the box needs to be tightened, you may detect a low humming noise in the furnace when off. Your furnace also works with a blower motor, which sends heated or cooled air across your home, and a capacitor, which starts the motor. If either of these pieces are fading, they will buzz when the furnace turns on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it can be due to something little, like an unfastened screw, or something serious, like a broken part. In either case, we urge you to shut your furnace off and getting in touch with our heating pros at 804-302-6657 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 alert you it requires some TLC. If you’ve forgotten furnace maintenance the past few years, belts could be worn down or a bearing could need to be lubed. We realize that maintenance often slips your mind, but our professionals can get your furnace operating quietly again rapidly.

5. Furnace Whistles

When you’re noticing your furnace making a whistling noise, it’s typically because of an air leak in your ductwork. You might also notice whistling while the furnace is working if a floor vent is loose. If you’ve looked at your vents but are still sensing whistling, Herman Allen Plumbing, Heating & Cooling can help. It’s essential to get loose ductwork taken care of fast, since it can make comfort issues in your house and inflate your gas costs.

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 often means there’s a problem with your furnace’s blower. Turn off your furnace off immediately and reach us at 804-302-6657 for help.

When you’re hearing an uncommon noise from your furnace, Herman Allen Plumbing, Heating & Cooling is here to provide assistance. Contact us at 804-302-6657 to schedule your furnace repair appointment today.