My Attic Fan Not Working

If you notice that the ventilation from the attic fan is not flowing as well as it should be there might be a blade caught somewhere.

My attic fan not working.

Locate the thermostat casing and open it using a screwdriver. 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 it is rotating slowly or not producing a lot of air in the high speed setting you may have a problem with the exhaust or intake. 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.

In this case shut off the power to the fan and check the blades. Make sure to visually inspect your fan to see if it is operating before troubleshooting. If there is any damage to the belt replace it with a new one. If the fan motor is not working properly it must be replaced.

During your visual inspection please note that passive ventilation from the attic can make the fan blade spin slowly even if the fan is not working properly. This video shows you how to locate and replace the fuse inside a fan. Attic fan not turning on. Switch off the power of the attic fan and remove the power cord.

If the motor is working but the fan blades are not moving the problem may be the belt. If the vents are blocked by insulation boxes or other obstructions heat will not be able to escape through them and they will not spin. Check the breaker to the fan and make sure it is flipped to the on position. A fan motor that is burning out won t spin the fan blades fast enough to open the shutters.

If your solar attic fan is mechanically not working this may be a warranty issue. If the fan is getting power determine whether the fan motor is working properly or not. This issue can happen on any type of attic fan as it is caused by the fan blades being bent dented or broken. In some fans the fuse is hidden inside one of the short fiberglass sleeves gold color.

If you notice that the attic fan is not switching on or off according to temperature variation it indicates that the thermostat is no longer functioning properly. Clear away any debris or insulation blocking the vents to re activate the spinning turbine. When running at a high speed setting does the attic fan run hard or sluggishly. Climb up into your attic and look at the vents from the inside.