I've seen a few....
U only get to control blower speed with it...temperature u gotta have a seperate switch somewhere, and the vents, obviously u cant control...
Yes.. can be done. I have the unit and the relay.. wanted to install in my kelisa. But i decided against it as i dunno the guy will screw up my wiring or not. :)
this always happen when i leave the car in the hot day (lunch time). the needle just sticks to 0. after driving about 5 minutes, then it just working fine.. is this normal? using apexi EL..