Carrier Furnace Exhaust Fan Noise

If you hear a sound like a loud bang or boom coming from your furnace you would certainly be wise to be concerned.

Carrier furnace exhaust fan noise.

The motor shaft and the wheel will be noisy as it turns. These fans can be direct drive to an electric motor or attached to a belt and drive wheel assembly if the fan is located far from the motor. The blower will make noise if the ductwork is undersized. Check the set screw to ensure that it is properly tightened.

Having dirty burners in your furnace can cause a delay in ignition. Several problems can lead to a noisy squeaky fan. Not only are furnace exhaust fan noises disruptive they may also indicate potential problems within your furnace that need to be repaired immediately. If the set screw is loose the blower wheel will wobble on.

The sound went away and the system is functioning. Ours is original equipment and has been in service for 25 years but there is a wide distribution in lifetime for this component. A furnace exhaust fan in need of repair is of particular concern since it is such a critical component of your system. I have a carrier gas furnance that was making a loud whining noise.

Inducer motor hc21ze125 https amzn to 2wnirzi inducer fan la660003 https amzn to 2. Is the motor difficult to replace. I traced the sound to the electric exhaust blower motor ao smith model je1d013n. Is there also a screw bolt at the end of the shaft that must be.

I see the three mounting brackets clearly. These fans must run whenever the furnace is lit and they often cycle when the furnace is not blowing warm air because the pilot light is always burning. So the gas will build up instead of the gas igniting immediately. If you block this off to reduce the noise then your gas furnace will not operate properly and it could be dangerous.

The blower wheel blows air out of the furnace and through the house. The hvac professional may not be able to easily solve your problem aside from the maintenance service i mentioned above. My carrier natural gas fired furnace has one which makes detectable noise until the main blower comes on and then noise from the inducer fan is drowned out by the main blower noise.