R33 Climate Controll Wont Go Cold

[MIIK3Y]

hey guys new to this forum my names Mikey and i drive a R33 GTST, i have noticed something with my climate controll i can press the auto it will be at 18 degree's but it will be really hot, but then some times it might actually come out cold, its rare that it comes out cold, has anyone had a issue like this?? pls inform me with any suggestions pls

Thanks in advance!

[Joe_89]

hey guys new to this forum my names Mikey and i drive a R33 GTST, i have noticed something with my climate controll i can press the auto it will be at 18 degree's but it will be really hot, but then some times it might actually come out cold, its rare that it comes out cold, has anyone had a issue like this?? pls inform me with any suggestions pls

Thanks in advance!

This should help.

I had a simelar problem with mine a while back, the diagnostics showed it to be the PBR, which is the black box located on the right underside of the dash (left side of the divers foot-well)

It has touched sounthing it shouldnt have, and the force of the conductivity bent the tabs upwards so it wasnt working properly.

Im sure that probably doesnt make any sense but if you have the same problem then you will see what im talking about when you pull it apart

Climate Control DiagnosticsR32 and R33

The climate control has a diagnostic mode.

Enter the diagnostic mode by pressing the OFF button for five seconds withinten seconds of turning the ignition on.

Sensor check

Sensor check is selected by pressing HOT switch (the red triangle) while indiagnostic mode. The microcomputer detects whether each sensor input signal iswithin correct parameters. The results are displayed on the screen.

If normal, a "20" is displayed.

If abnormal the failed sensor number is displayed. The sensor numbers are asfollows:

20 - all is normal

21 - outside air sensor

22 - Inside air sensor

23 - Water temperature sensor

24 - Intake temperature sensor

25 - Sunload sensor (small sensor on the left hand side of the dashboard near thewindscreen)

26 - PBR

27 - Refrigerant temperature sensor

This should tell you if any of your sensors are faulty.

Mode door position check

(This is probably not the cause of your problems but it is a nifty self checkto play with). While in Sensor check, depress the HOT button again. This willoperate the the mode door actuator, and checks the whether the positiondetection switch is operating. Again the results are displayed on the display.

If normal, a "30" is displayed.

If abnormal the number of the faulty mode is displayed as follows:

30: Normal

31: VENT

32: B/L (Bi level)

34: FOOT

35: DEFROST/FOOT

36: DEFROST

Actuator operation check

By pressing the HOT button while in Mode Door Position check, you can actuallysend a signal to check the operation of the actuator manually. This is a bitcomplex, and will be expanded upon when a manual can viewed.

Sensor recognition check

Press the HOT switch again and a "5" will be indicated in the displaysection. If you press the "AMB" button (R32) or the windscreendefroster button (R33) in this status, the display will show the temperaturesensed by each sensor. This will give you an indication also of which (if any)are faulty.

Temperatures will be displayed in the following order (R32):

5 -> Outside air temp -> Inside air temp -> Suction temp ->Refrigerant temp

R33 seems to have a different selection, with three temperatures beingdisplayed.

Obviously if any of these temps seem excessively different from actualtemperatures you have a problem!

Calibration

If you depress the fan switch during the Sensor Recognition check, you will goto Calibration in which you can set the difference between the indicatedtemperature and sensed temperature.

While in Calibration press the HOT or COLD buttons to change the display byplus or minus 3 degrees in .5 degree increments (R32) or 1 degree increments(R33).

[Fryday13]

I wish I had your problem! its winter here and my car wont go hot.

Joe if I used these numbers youve given here would it still work for mine? 95 R33 GTS4?

[Joe_89]

I wish I had your problem! its winter here and my car wont go hot.

Joe if I used these numbers youve given here would it still work for mine? 95 R33 GTS4?

Yea mate, all 33's

[iwanta34gtr]

Check the actuator. It may have siezed or unplugged at some point.

Second part of the air con diagnostics instructions above will confirm this 4 u.

Edited August 28, 2011 by iwanta34gtr

[Fryday13]

Problem Solved! I didn't so much check the lights as take out my AC control unit in the centre console and then unplugged it blew and rubbed some dirt off and tried to "clean" the ports etc. Stuck them back in and now it works. So not to sure exactly what happened but I fixed it

It was my step before Hit it and see if it works