Turned the heater on in the car for the first time today and got nothing but cold air . At the minute al i can think of is if there is an actuator somewhere in the system thats failed. Everything else seems to work although its that cold i cant tell if the aircon is working. There are no other symptoms at all the only difference in my car is i am running an aristo controller rather than a GS one, However that seems to be functioning ok turns everything on and off and shows a temperature rise on the readout but there is no physical rise.

If anyone has any ideas or prior experience before i swap back in my old controller or start hunting down the matrix actuator switch i would be grateful


Cheers

Austin

Found it !!!

the cable running from the control motor to the rotary valve that opens to the matrix had come off, i simply hooked the cable back on and voila heat again.