Is Your Gas Furnace Trying To Tell You Something? | Air Comfort HVAC

Bang! Bang! What’s that sound? A noisy gas furnace is a problem for any homeowner. Far more than a nuisance, if your furnace is making noise, it’s very likely trying to tell you something… but what could it be? Air Comfort HVAC has rounded up some common furnace sounds and the problems they might suggest.

Is your furnace making…

Clicking sounds?
Brief clicking as you turn your system on or off is pretty standard. Repeating clicking noises, however, may point to a bad relay.

A loud boom, bang or pop?
This often suggests a delayed ignition. Because late ignition creates an excess of fuel buildup within the combustion chamber, you should call a professional right away.

Lots of banging noises? There may be a broken or disconnected fan component. Turn off your system and talk to a pro. There are a variety of causes for this sound and only a professional can safely discover which one is happening.

A humming or buzzing sound? A humming furnace can point to several different issues–but your HVAC pro can help identify the problem.

Persistent, low rumbling sounds?
You might have a problem with the burner. If you notice constant rumbling, turn your furnace off and give an HVAC pro a call.

A rattling sound?
This usually suggests a disconnected component, or failing motor. The louder the rattle, the more serious the problem in most cases.

Thumping or vibrating sounds?
We’re usually looking at a damaged blower wheel or motor. To avoid further damage to your furnace, turn off your system until it can have a professional inspection.

Scraping sounds? A metal-on-metal scraping sound commonly indicates a broken blower wheel or motor mount. Turn off your furnace and call a professional promptly to lessen the damage.

Squealing or screeching noises?
If it’s heard briefly at startup, don’t worry–that’s normal. Recurrent or constant squealing and screeching points to a few possible problems like a loose fan belt, a need to oil the motor bearings, a damaged compressor or a malfunctioning blower motor.

Whistling noises?
Usually, whistling happens when there are duct leaks in your system.

If your furnace is making any of these noises, you probably need to bring in a professional to give your system a once over. Please don’t attempt to DIY a furnace problem as it’s a real fire and combustion hazard best left to the experts. Visit our website today to go over our products and services or give us a call to schedule your appointment.