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.

The attic fan has 2 speeds. At least some fans that use a high low switch use a 3 way switch. Install the switch box and switch. I d start by examining your high low switch to see how it works.

Since you have to choose between the speeds using a two speed motor switch it s impossible for both coils to become energized simultaneously. 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. 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. The louvers in front of the fan located in the attic open by the wind generated by the fan i e.

So depending on which is energized you get either a high or low. Find a live receptacle for the power source. High low common and ground going to the cooler. In many instances the low and high speed coils share an external wire.

The load is then routed to the fan using either the black or red of a 3 wire. Location of power supply and 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. 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 line comes from the timer to the common of the three way switch. Additionally the low speed coil is typically supplied by a red wire while the high speed coil is fed by a black wire. There should be 4 wires.