Stuck on hot or cold air 2009 Holden ve commodore SV6 Auto Series 1

[adios57]

This is from my notes which were after going through the wiring diagram which could be wrong.
It is the air conditioning control module
Connector A 2 wires A1 From fan motor orange
A2 Black to body earth behind kick panel on LH or RH on climate control
Connector B wires B14 from fuse F2 engine compartment Orange/green trace
B10 low speed serial data circuit diagram 31 green
B6 Demister relay white/blue engine compartment
B13 A/C Compressor green
B12 A/c compressor blue
B12 electronic displacement valve in air compressor blue
B13 electronic displacement valve in air compressor green
Climate control models use Connector B in order B4, B5, B2, B1, B8, B7
Connector D 7 pins RH air mix
Connector E 11 pins Auxiliary Air mix 5 pins
Auxiliiary air mix 5 pins

Large connector C Fresh recirculating reverse at pin C16 white/blue trace
C15 White /black
C9 Blue/black
C6 White/red
C20 White/green
LH Air mix C13 white
C14 yellow
C10 black/red
C5 black/yellow
C19 black/white
RH mode motor C11 light green
C12 orange
C22 light blue
C4 red
C18 pink
LH Mode motor C2 brown
C1 black
C21 Blue
C3 grey
C17 Green
Evaporation sensor Black to C8
Black to C7
I hope these help someone.

 

[VT2Commie]

DTC 0253 with symtom byte 2A, is related to the No. 4 actuator circled in your above post. (I wish you luck removing this actuator) have some colourful words at the ready when trying to remove this.

These International Air HVAC systems made for GMH will not complete a HVAC door relearn if any ONE of the actuators are faulty.

You will need to replace the first listed faulting actuator on the scan tool first. This will be the No. 4 circled actuator in your diagram of the HVAC system. Vent/Floor door motor actuator.

Then perform a relearn (most important is having the engine running while you do an actuator recalibration so that the system is at full voltage (12-13 Volts), modules like full power when relearning things, and not having the engine running and a weak battery will cause issues when relearning the actuators). Once you have done this it is possible the second DTC B0418 symptom byte 2A will go from PRESENT to NOT PRESENT.

Clear all the codes and do another HVAC Door Recalibration. and if no other faults show up you should be good to go as you have confirmed the Recirc door hinge is all good.

P.S. Would recommend new actuator replacement in the repair also.

 

[OldBomb]

Hope it's not a head gasket. Hot air can disappear if air gets into the cooling system. Mine only blows cold air through the HVAC & pretty sure the problem is a buggered head.

 

[uglyoldfatbastard]

DTC 0253 with symtom byte 2A, is related to the No. 4 actuator circled in your above post. (I wish you luck removing this actuator) have some colourful words at the ready when trying to remove this.

Sore back, sore neck and a hand cut to shreds but the good news is putting it back in is easier than taking it out