It’s late at night and you are ready to head upstairs and go to bed when you hear a loud noise coming from the basement. You know that such a sound could only be made by one of two things: The furnace or the Boogeyman who lives in the basement.

A properly functioning furnace shouldn’t take too much noise. At least, not a loud noise that is enough to startle you and make you wish you had not watched that creepy movie earlier in the evening.

Oxford Energy, your HVAC repair service in New Jersey, is going to run through some of the most common sounds your furnace might make and what they might mean.

Screeching Noises

A screeching noise from your furnace is most likely due to a problem with the motor bearings. This issue can be dealt with by a professional with lubrication, a special lubrication made specifically for this type of problem.

A screeching noise could also be a problem with a belt. You might have to have your furnace technician change the belt.

Scraping Noises

A scraping noise coming from your furnace could mean that you have two metal parts rubbing together. The blower wheel could be scraping the casing or some other part of the furnace. You will need to get a technician to come over and take a look at it.

Banging and Popping Noises

Popping and banging noises coming from your furnace are rather common. Most of the time, these sounds come from the air ducts when they expand and contract in the cold and heat.

While minor popping is normal and expected, a loud bang or pop is a whole different story. Now would be the time to give us a call.


A rattling sound that won’t go away could indicate you have something broken in the motor or the fan. If it is a really bad rattling noise, it could be a sign of complete system failure.

Either way, you will need to call your HVAC pros.


If you hear chirping coming from your furnace, a bird obviously snuck in through the ducts on is now trapped.

Just kidding, it could be that you haven’t used your furnace in a while and it might go away in a little bit. If not, it could be a loose belt that needs attention.


A clicking noise coming from the furnace usually means you have a faulty flame sensor or it needs to be cleaned. It could also be a problem between the gas and the ignition system. Either way, you will want to call your furnace repair people right away.


A humming furnace is a furnace that seems to be running quite normal. It is a sound that is rather soothing.

Not all noises indicate that there is something wrong with your furnace. But it is always a good idea to have your furnace inspected at least once a year to ensure everything is up to par. This way, you will have peace of mind and better able to rest easy at night. Give Oxford Energy a call today.