Aircon On R33 Malfunctioning In Deg/c Adjustment

[ausdrift]

So recently got the AC regassed after shipping it to OZ. It was working fine but lately ive noticed that that temp setting sometimes doesnt work reliably. Like If i have it on 18 deg/c its nice and cold, but then if i bring it up to, say 20, it will be warm as if the AC is no longer on and its just running as fan air. Then id drop the temp back, and cold AC air would crank back on. So basically, what is causing this inaccuracy of temps? is it a sensor or something with the indash unit?

Ideas?

thanks

[89CAL]

is it only cold on 18?

If so it could be the interior or exterior air temp sensor

my outside temperature sensor plays up similar to this when I go to the car wash, not sure why but sometimes the fan wont go any higher then the 1st fan speed setting and isnt that cold. turn to 18 degrees and its ok

[sadr33]

Do you hear a mild click click click when you change the temps from 18 to 22 etc? MIne does what you are descriping but all I hear is click click. When I set it to 32 I get no heat coming out even thought engine thermostat and water temps, circulation etc seem fine.

I'm guessing its the mechanism that lets hot air in or not for me. Not sure if its the same for you.

[ausdrift]

Yeah, it typically is only cold on the low degrees. Where are the sensors located? Has anyone replaced them before? how? costs?.

I dont hear clicking sounds when I change the aircon settings, but I do have a similar weird clicking sound from the dash sometimes - see http://www.skylinesaustralia.com/forums/topic/415346-strange-electrical-noises-coming-from-under-the-dash/

Still dont know about that either. Could be related.

[ausdrift]

anyone else?

[t_revz]

To the left of the steering wheel on the dash is a small grille. If the Hose falls off the back it does similar things

[ausdrift]

excellent. Ive messed around under the dash there a bit before. Ill check it out.