FB to take control of a digital hvac system?

**BiGGy** · 07-31-2007, 09:37 AM

I really want to take control of my air con now, I want to know if its possible and a difficulty rating. Its a digital climate control, the unit also has rear demister control. It has 2 wiring looms in the back with total wire count of around 30. I have some detailed wiring diags for the unit as well. I think some hefty skin work will be needed if this is possible. Shed some light for me! cheers

Im asking this because I am installing a large lcd in my dash and there is no room for it any more.

**greenman100** · 07-31-2007, 10:43 AM

Very possible, you need to be able to solder, and a relay for every switch on the front panel.

**2k1Toaster** · 08-01-2007, 12:28 AM

It shouldnt be too hard to create a skin file with that configuration.

I would say a difficulty rating of 6 or 7 total out of 10. But since you have a detailed wiring diagram half the work of finding out which wire does what, is already done for you, so probably like a 3 or 4 now.

**BiGGy** · 08-01-2007, 01:45 AM

hmm interesting theory.

**BiGGy** · 08-01-2007, 01:53 AM

I know I could get air blowing out with a FB, but I want the full features of the automated climate control, for example it sensors the cold, turns the heat up, if heat if on full it changes the vents to the feet ones so the heat can rise, when the fans are on full it never blows in the face vents until it calms down abit, also there is a demister button that auto sets the temp and fans to demist the front window, the rear button just turns on the heat wires in the window. And if I want to manually change somthing it automaticly overrights the car, manual temperture is controlled by a digital rotary knob, and is all displayed on a small lcd. Also has inside and outside temps. All these little things I want in the FB setup, basically its a bunch of IF and ELSE statements that needs to be hardwired, can I do this with just relays?

ive attached the wiring diags, if you guys got time, have a look and give me an idea of the relays, pcbs etc ill need.