One speed only after replacing the 3 speed control switch on a harbor breeze ceiling fan? I have checked the wiring 3 times and it is installed properly Why woukd I not get 3 peeds to work??

how hook up air handler variable speed to thermostat

I replaced a Hampton bay three speed fan switch I put Black onL, Grey on 1, brown on 2, and purple on 3 and now fan only works on high and low after a couple of pulls no off or middle speed.

I have goodman variable speed air handler and a 14 seer 410a unit, along with a Honeywell programmable 2 stage thermostat. The fan ramps up and down continuously when the temperature is near the set point. I've had it looked at a couple times now and nothing. Does anyone have any suggestions or...

I am installing a new two stage heat pump, rudd IUHPL. The 24 volt transformer is in the air handler. The transformer is energized and putting out 24 vt. Which enters the circuit board. The red wire leaving the board is 0 vt. As I understand the system this red wire is supposed to supply 24 vt to...