High Speed Not Working On Attic Fan

After attic fan installation ac still off during day.

High speed not working on attic fan.

If certain ceiling fan speeds are not working there are a few things that could be the problem. 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. You can fix this issue by turning down the settings or checking that the fan is getting enough air. 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.

Luckily finding out the source of the problem is not all that difficult. 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. However they are not an effective ventilation mechanism and it can get really hot in the attic during summer. Temp 84f at 5pm.

This was observed on numerous days following the installation. If you are working on two speed motor wiring you will need an ac power supply the two speed motor and a double pole double throw switch. If there is any damage to the belt replace it with a new one. Little or no airflow.

By pulling in cooler air a whole house fan reduces or eliminates the need for air conditioning. 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. The attic fan kept my house cooler by 8f compared to pre fan installation days. During workdays would leave air conditioner off when leaving in the morning.

Quietcool attic fans work almost everywhere almost anytime. With an attic fan you can cool the attic to the same temperature as it is outside greatly reducing the house from heating as quickly. The first thing to try is to clean and lubricate. 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.

The attic is usually built with vents that are designed for ventilation purposes. Shut power off first. Temp 92 f at 5pm. Attic fan not turning on.

Best of all whole house fans use only one tenth of the energy that air conditioning does. Remove the outer casing of the attic fan and check to see if the belt is sagging cracked worn or broken. Attic fans can sometimes start making noise whether it s humming rattling or making some other annoying noise. But when the fan isn t working the way it should follow these steps to troubleshoot the problem.

This heat can build up the attic temperature to high levels and heat can then percolate to lower levels. During the summer an attic can be 40 to 50 hotter than the outside temperature which in turn heats up the house very quickly. How to troubleshoot a whole house fan. When running at a high speed setting does the attic fan run hard.