How To Wire High Low Switch On A Attic Fan

Determine the fan switch location.

How to wire high low switch on a attic fan.

These louvers are not energized but the aforementioned louvers in the 2nd floor ceiling open via an electrified switch that when energized with electric pulls the louvers open. The process of wiring an attic fan involves the power source and switch location wiring connections to the switch and wiring connections to the fan. At least some fans that use a high low switch use a 3 way switch. The attic fan has 2 speeds.

If you are trying to switch the speed on the roof mount cooler then you should use a cooler wall switch. The line comes from the timer to the common of the three way switch. Run a black wire from the low speed post marked on the rocker switch to the marked low speed line on the fan motor and a red wire between the high speed posts on the rocker switch and fan motor. Install the switch box and switch.

Here are 3 tips to help. Find a live receptacle for the power source. Since you have to choose between the speeds using a two speed motor switch it s impossible for both coils to become energized simultaneously. Use wire nuts to connect the black wire from the 12 2 wire to the black or red wire in the attic fan the white wire to the white wire in the attic fan and the two ground wires.

The louvers in front of the fan located in the attic open by the wind generated by the fan i e. There should be 4 wires. The dedicated cooler wall switch have 5 position that can operate the fan on hi and low and fan with pump on hi and low. High low common and ground going to the cooler.

So depending on which is energized you get either a high or low. In many instances the low and high speed coils share an external wire. I d start by examining your high low switch to see how it works.