Remove the outer casing of the attic fan and check to see if the belt is sagging cracked worn or broken.
Roof fan stopped working.
Best of all whole house fans use only one tenth of the energy that air conditioning does.
But when the fan isn t working the way it should follow these steps to troubleshoot the problem.
How to troubleshoot a whole house fan.
Roof vents with fans like the maxxfan roof vent w 12v fan ma00 04000k do not have a fuse anywhere in the fan itself.
If the motor is working but the fan blades are not moving the problem may be the belt.
If the attic fan isn t turning on it could be an electrical issue a problem with the thermostat or the motor of the fan that s not working.
Fan motor runs but not the blades.
Over time wiring can break down or weaken which causes this problem.
By pulling in cooler air a whole house fan reduces or eliminates the need for air conditioning.
If there is any damage to the belt replace it with a new one.