Dual zone A/C issue

[Luke V8]

Hi All,

The passenger side on the aircon is only blowing warm/hot air. It doesn't matter if through dash vents, foot vents etc is just comes out warm in the passenger side only.

And yes, I have checked that it is set to cold :-p

Would this happen if it needed a recharge?

[Zerone_V]

I am thinking that the problem is the dual zone blend door motor module.
This module is used to direct air to the cabin heater core, to heat or cool the air a required.
(It directs more air to the heater from warmer settings, and less air for cooler settings).

It is possible that the motor is stuck, or the module may have issues....

hope this helps

[RiCeY]

Not a module, its an actuator. Though the HVAC module which controls everything could be the issue.

Try a vent door actuator relearn. With IGN on, press and hold the rear demist button till you hear the vent actuators start moving. They are fairly quiet so have all doors and windows closed and fan/radio off so you can hear it.

Once they stop try the AC and see if its fixed.

Do you hear any clicking in behind the dash when you IGN on or change modes?

[StoneX]

Is dual zone driver/passenger? I thought it was front/back.

[Voodoo_SV6]

It's driver/passenger.

I'm not sure what zone the back vents are linked to. Never tested that one

[RiCeY]

Face I think...

[TumTum]

Does the screen on the stereo show DZ or SZ? If it's SZ, whatever the driver's side temperature is set to will come out the passenger side. Just a thought only because I did that once...

[Luke V8]

Thanks all. Tried relearning and it didn't work.

Even If I put it to single zone and cold the passenger side (face and feet) and rear vents come out warm but drivers side nice and cold...

Arrggggghhhhh

[RiCeY]

Try pulling the radio/HVAC facia off and refitting it.

[RiCeY]

Failing that take it somewhere to check for codes relating to the HVAC system.

[Luke V8]

Cheers ricey - how do i take it off?

[RiCeY]

Move the gearstick back away from the facia. Wrap you fingers up under the base of the facia and pull. It can take some force but it will come off, just be carefull not to hit the gearstick with it.

[Luke V8]

It's auto

[Johnsy]

Back is set to face as stated above... and the dual zone does work in the back as well even though the vents are close and doesn't make much difference unless its cranking and you have them pointing away from each other...

[RiCeY]

It's auto

Still has a gearstick

[Luke V8]

Just down at Holden at the minute - one of the doors for the aircon is jammed or something. .. About to find out the damage

[Luke V8]

turns out its a clip that aids on opening & closing the aircon doors (behind the dash). A fairly common problem they tell me. Have to take the dash out to fix.

He also informed me that i actually have about 4 months left of warranty! so not going to cost anything

[Johnsy]

Good to hear you have sorted it out Well done !!

[Luke V8]

Cheers mate / will let you know after Tuesday if sorted!