My Attic Fan Does Not Work

Check the fan and make sure it is functioning properly.

My attic fan does not work.

As for your attic fan my advice is to disconnect it. During workdays would leave air conditioner off when leaving in the morning. This was observed on numerous days following the installation. The attic fan kept my house cooler by 8f compared to pre fan installation days.

If there is any damage to the belt replace it with a new one. A fan motor that is burning out won t spin the fan blades fast enough to open the shutters. Check the breaker to the fan and make sure it is flipped to the on position. Here s why attic fans are seldom the most efficient way to vent an attic.

If the fan is getting power determine whether the fan motor is working properly or not. Temp 84f at 5pm. Does the fan turn freely if pushed with a finger. If its nothing obvious then disconnect the pv panel and with it in the sun check it with a volt meter to see if it is putting out voltage.

Temp 92 f at 5pm. If the fan does not run with the pv panel in the sun i d look for a loose connection or something keeping the fan blades from moving. Electrical issue your attic fan may not be turning on because of an electrical problem like a tripped circuit breaker a blown fuse or a bad connection. 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.

If the motor is working but the fan blades are not moving the problem may be the belt. Even though an attic exhaust fan can incrementally lower the temperature of a very hot attic using a fan does not stop the source radiant heat. Most fans cannot keep up. After attic fan installation ac still off during day.