If your interior ac heat fan blower motor is making noise like a card in a bicycle spoke then you probably just need to clean.
Hvac blower fan making noise.
The sound also might mean that the motor needs lubricant which you may or may not be able to do yourself depending on the furnace make and model.
Quiet a loud blower motor.
If it s conditioning not cooling this could be why.
Refrigerant leaks resulting in your air conditioning freezing up.
But they run a lot and move thousands of cubic feet of air every year.
Blower and fan noises such as squeaks squeals and rattles may be transmitted through the duct system.
Outdoor fan motors and indoor blower motors squeal loudly when they re going bad.
It does take a special type of lubricant though not an ordinary household type.
This can signal a bad fan belt in the blower.
If your furnace blower motor is making noise try not to panic.
There could be several explanations for the noise and even.
The only true moving parts in your furnace are the blower fan and motor.
Strange noises coming from your hvac system are never a good sign.
An unusual sound can cause home owners to worry leaving them wondering if there is something majorly wrong with their equipment.
If it is that belt should be replaced.
This is called flanking noise sounds traveling through the system that will reach into each.