When your furnace is operating like it should, it should provide heat without making too much disruption. While it’s normal to catch your furnace making noise as it begins running, other noises are showing your furnace should get immediate professional help.

Here are some of the most reported furnace noises and what they might be indicating. If your furnace is making an atypical noise, our friendly heating specialists are here to assist with the best furnace repair in Greater Richmond, Virginia.

1. Furnace Makes a Banging Sound

You could 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 signal there could be a few problems. These involve gas accumulating in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system becomes dirty as time passes, so that’s why it’s essential to book annual furnace maintenance with Herman Allen Plumbing, Heating & Cooling. One of the tasks our techs do during this work is clean your furnace’s burners. When this piece gets grubby, you may hear your furnace making a loud rumbling noise if ignition takes more time. The subsequent gas buildup might break your furnace’s heat exchanger, where natural gas transforms into warmth. Any cracks in it can emit carbon monoxide, which is normally released outdoors. This toxic gas can be lethal 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. Excessive natural gas in your furnace or a fractured heat exchanger are dangerous problems that should get prompt service.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to deliver heated air around your residence. If the ductwork wasn’t put in correctly or is getting old, it can make a lot of noise when your furnace runs. This may 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 observe your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound typically is telling you there’s an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to operate on the correct voltage. If wires or the box is loose, you could hear a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves warm or cold air across your space, and a capacitor, which turns on the motor. If either of these parts are failing, 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 related to something little, like an unfastened screw, or something critical, like a broken part. In either case, we advise shutting your furnace off and calling our heating pros at 804-302-6657 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s trying to get your attention it needs some TLC. If you’ve forgotten furnace maintenance the last couple of years, belts could be worn down or a bearing could need to be lubed. We know that maintenance sometimes slips your mind, but our pros can get your furnace running quietly again fast.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re hearing your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You may also notice whistling while the furnace is running if a floor vent is loose. If you’ve checked your vents but are still noticing noise, Herman Allen Plumbing, Heating & Cooling can assist you. It’s critical to get loose ductwork repaired fast, because it can make comfort issues in your house and drive up your energy 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 sound often means there’s an issue with your furnace’s blower. Shut down your furnace off promptly and reach our professionals at 804-302-6657 for help.

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