Common Furnace Noises

A furnace (forced air heating system) can be a noisy thing. But you don’t like it that way. You like it when it’s nice and quiet, just leaving you nothing to think about, and everything to enjoy.

Then, the inevitable happens. Your furnace starts getting up there in years and just isn’t its old self. It’s gradually slipping, becoming increasingly prone to repair issues, and soon you can’t help but notice that something’s not right.

Well, mixed into the group of “something’s wrong” are a series of common noises, each of which means something. Of course, to you, they all mean “annoying”.

Here’s what to listen for, and what’s likely causing each different sound.

Furnace Warning Sounds

Booming – It’s not uncommon to hear a boom when the furnace engages. In some furnaces, especially older models, a boom could indicate a gas build-up from a delay in ignition. If you smell gas, call a licensed heating professional at once.

Clicking – A clicking noise typically indicates a faulty flame sensor, or possibly a gas and ignition problem.

Squealing – Not unlike a car, a squealing noise could indicate a faulty belt, or perhaps a failing fan motor. A simple repair is usually all it takes to stop the squealing.

Rattling – Persistent rattling might indicate worn or broken components in the motor or fan. The sooner you report the problem, the better the chance that we can fix it. Wait too long, and there’s a good chance you’ll need a new furnace.

Chirping – It’s normal for a furnace to make a noise like a bird chirping at the start of the heating season. At that time, no action is required. If the chirping doesn’t end on its own, your fan belts may need replacing.

Preventive Maintenance is Key

The best way to prevent furnace or boiler problems – noises and others – is through annual preventive maintenance. Here at Correct Temp, we can spot small problems that, without proper attention, will most likely worsen over time thus causing higher repair bills and even the chance of premature system failure.

Don’t take chances – contact Correct Temp today for service, especially if it’s been a year or longer since preventive maintenance was last performed.