Fixing Furnace Noise

Why Is My Furnace in Norfolk, VA, Making So Much Noise?

March 9, 2024

Your furnace in Norfolk, VA, will make noise during operation. Although a furnace isn’t completely silent, excessive noise is a cause for concern. The sound you hear can tell you a lot about why your furnace is making so much noise.

Furnace Makes a Rattling Noise

A loose access panel or door can cause the furnace to make a rattling sound. If that’s not the problem, there’s possibly a loose part inside the furnace. An HVAC maintenance professional can check the furnace and tighten any loose screws.

If the furnace heat exchanger has a crack, that can also cause a rattle. This is dangerous because a heat exchanger that malfunctions can cause a carbon monoxide leak. Carbon monoxide is a poisonous gas that’s flammable, colorless, tasteless and odorless.

Furnace Keeps Clicking

A furnace often makes a clicking sound when it starts. However, the clicking sound shouldn’t keep going for the entire heating cycle. Constant clicking can mean there’s a problem with the ignition system.

It Sounds Like Someone Is Whistling

Dirty air filters can produce a whistling sound. If the filter has excessive dirt, the air makes a whistling sound as it moves through openings in the filter. The best way to avoid this is to make sure the air filter is clean.

Loud Knocking Comes From the Furnace

If you hear your oil furnace knocking, you could have air bubbles stuck in the lines. Draining the lines will release the stuck air bubbles and stop the knocking. This HVAC service is something that you should only trust to an experienced HVAC service technician.

Furnace Makes a Grinding Noise

A loose or broken blower fan can make a grinding noise when it rubs against its housing. You might also hear a metal-on-metal grinding noise if there’s a broken bolt or another piece of hardware stuck in the blower fan or motor.

The best way to determine why your furnace is noisy is to get an inspection. Contact Fair Mechanical today to schedule a furnace repair or maintenance visit.

Image provided by iStock

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