High Speed Not Working On Attic Fan

By pulling in cooler air a whole house fan reduces or eliminates the need for air conditioning.

High speed not working on attic fan.

Shut power off first. The problem could be in the timer if one of the poles is stuck and not disconnecting low speed when high speed is turned on. This was observed on numerous days following the installation. Attic fan not turning on.

Attic fans can sometimes start making noise whether it s humming rattling or making some other annoying noise. Remove the outer casing of the attic fan and check to see if the belt is sagging cracked worn or broken. The attic is usually built with vents that are designed for ventilation purposes. You can fix this issue by turning down the settings or checking that the fan is getting enough air.

However they are not an effective ventilation mechanism and it can get really hot in the attic during summer. This heat can build up the attic temperature to high levels and heat can then percolate to lower levels. Little or no airflow. 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 certain ceiling fan speeds are not working there are a few things that could be the problem. When running at a high speed setting does the attic fan run hard. Temp 92 f at 5pm. The attic fan kept my house cooler by 8f compared to pre fan installation days.

If you are experienced working with electricity you could try to disconnect the low speed wire and see if high speed will then work but again only if you know how to do it safely i e. Temp 84f at 5pm. If the motor is working but the fan blades are not moving the problem may be the belt. How to troubleshoot a whole house fan.

Best of all whole house fans use only one tenth of the energy that air conditioning does. The first thing to try is to clean and lubricate. Essentially we ll use process of elimination to get to the root of the problem. 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.

By connecting the proper wires to the high and low speed terminals on the motor and switch you can control how fast or slow it turns once powered up. After attic fan installation ac still off during day. Parts can come loose or erode from high amounts of fan usage while turning the speed up to high can cause a persistent loud hum. If there is any damage to the belt replace it with a new one.

Quietcool attic fans work almost everywhere almost anytime. Luckily finding out the source of the problem is not all that difficult. During workdays would leave air conditioner off when leaving in the morning. During the summer an attic can be 40 to 50 hotter than the outside temperature which in turn heats up the house very quickly.