If your furnace is making loud noises during operation, don’t ignore it. Sometimes, noisy operation is an easy fix, but it can also be a sign that your furnace is getting ready to fail. Here’s a look at common causes for noisy furnace operation and what they mean.

Banging During Startup

If your furnace only makes a banging noise when it turns on, there are two probable causes. This noise can be caused by the ductwork flexing due to pressure changes. Listen carefully to see if the noise you hear is really coming from the furnace or somewhere in your ductwork, in which case a weak section will need to be reinforced.

The noise can also be caused by an uncommon issue known as ignition rollout. This is essentially a tiny explosion or burst of flame at startup. With the doors closed, watch the furnace when it turns on. If you see shaking along with the noise, it’s important to call a furnace specialist right away. This problem is caused by dirty burners that delay ignition, allowing a dangerous buildup of gas that can crack your heat exchanger.

Rattling Noises

If you hear rattling noises coming from your ductwork or furnace, it may be caused by loose panels, screws, or ducts. Fixing this problem may be as simple as reinforcing loose ducts or tightening your panel screws.

A much more serious cause of rattling is a crack or leak in the heat exchanger. This may allow dangerous carbon monoxide to leak into your home, so the problem needs to be addressed right away.

Rumbling Noises

Rumbling during operation is commonly caused by deferred maintenance. Your furnace’s pilot light may need adjustment or the gas burners may be dirty. Check your pilot light and call David White Services for a furnace tune-up if the flame is any color other than blue.

Screeching or Squealing Noises

Whistling, squealing, or screeching noises may not be as serious as a loud boom coming from your furnace, but these noises should still be investigated. Screeching or whistling can be a sign of a malfunctioning blower motor, a worn or loose blower belt, or dry moving parts that can get worse over time and eventually lead to expensive repairs or even premature system replacement.

Concerned about strange noises coming from your furnace? At David White Services, we can inspect the problem and provide efficient repairs for the issue. We also offer furnace installation and maintenance as well as air conditioning services and ductwork. Contact the team at David White Services today to schedule an appointment for a furnace tune-up or repair for your home in Athens.

company icon