My Furnace is Making a Weird Noises Pt. 2

In our previous post we discussed the frustrations brought about by a noisy furnace. The blog went into detail regarding the issue of a whining noise coming from your furnace. This blog discusses another irritating and quite unsettling noise coming from your furnace.

Loud banging noise when your furnace starts up: If your furnace is making a loud bang as soon as it turns on don’t panic right away.  If your ducts are made of metal this may be the reason.  When your blower turns on and off, it can cause your ducts to expand and contract.  If this is the case then it may mean that your duct returns are not the appropriate size or the ducts may be too delicate.  Also, if too much dirt is built up on your furnace, it slows down the igniting which results in a buildup of gas.  When it does ignite it creates a mini explosion that over time can crack the heat exchanger. All of our techs are heat exchanger certified and have the skill to detect a breach before it really fully expands.   This is another reason why Poorman’s stresses the importance of maintenance checks and furnace tune-ups to catch problems before they happen.

My Furnace is Making a Weird Noise Pt. 1

Nothing is worse than a malfunctioning furnace during the dead of winter! There is however, something that is equally as frustrating as a broken furnace…and that’s one that makes a lot of noise!

What to do if your furnace is making a whining noise:

The most common cause of whining noise is a damaged blower motor.  Based on how badly it is malfunctioning, it can either be fixed or replaced by one of our technicians.  That sounds scary, but not to worry, depending on the age of your system, the part may be under warranty. Also the blower belt may be loose and slipping or frayed.  If it is slipping it can be fixed, but if it is fraying it will eventually need to be replaced.  Another cause for whining is that the shafts may just need to be oiled with a light lubricant. When you hear this noise, we recommend shutting off the furnace right away. Give us a call and we will gladly send out an experienced HVAC repair technician.