just about to change out the climate control unit in the centre console (again)
have ordered a new porcupine resistor (the spines are bigger than a hedgehog) in the hope this might stave the sudden battery drain issue and also stop the CC unit from burning out. Still got to check out some other relays as gap is pointing out an a/c relay short to earth. whether it turns out to be the solenoid on the a/c causing problems time will tell. have never turned the aircon on so don't know whether it works or not and don't know if it works in conjunction with heating in the car...