vr4 air con not cold enough

[rob323]

After getting intimate with the ac system in my '87 J spec vr4 on Saturday (replaced all seals, flushed system, cleaned evaporator and condensor, regassed/ oiled, checked operating pressures etc), I am still not achieving really cold air coming out of the vents.

The best I am getting is cyclling from 8 to 10 degrees where as it should be down around 4 degrees according to the US manual that I have.

Mine has the digital climate control setup, the US manual only seem to cover the knob type controls.

I have checked the thermistor, it checks out all ok. I even replaced it with a spare I have but this didn't change things. My next step is to play around with the thermistor to see if I can fool the climate control into thinking it is hotter than it really is.

Does anyone know of any other things to check?

Does the digital climate control box have a diagnostics mode?

Any help would be appreciated as summer is now here with a vengance.

(Just replaced the digital control unit with a spare I have, no difference - bugger).

 

[Entaran]

Check the sensor in the roof. If it's registering colder than it is, that will cause a problem. It's basically in the centre of the roof and looks like a clip or whatever.


I wouldn't really know, my air-con isn't gassed and never has been. Ballarat's never hot.

 

[rob323]

air con

Haven't tried that one yet, can't find it anywhere in the manuals. I was planning to sit in the car with a hair drier and play around with the sensors to see what does what.

 

[Entaran]

hairdryer will work. I used my hand (cupped over it) but that took a fair while.