I *think* my climate control is not working properly.

[cobrAA]

Here's what happens with my climate control. let me know if it's normal..

1. Wont blow air unless fan is set at 4. 1-2-3 won't blow nothing.
2. Can't get hot air even if set at 32c.
3. Can't get cold AC air ( all I get is like 20-25c air)
4. Sometimes my unit freeze, can't turn it off, can't turn the fan off, Nothing, it's just frozen. It will however turn off when I turn ignition off.
5. Lately, I found japanese writing on my unit. I never saw this before.

So, I don't think this s normal but hey! please let me know what you think!

[archaeic_bloke]

these old units are finnicky, i have a similar problem to what you describe, i think the old circuitry is breaking down and we're seeing a lot of quantum tunnelling in the transistors (also known as electrical leakage) and it can cause things the unit to stay on when you press off - thats the transistors not doing their job -

have you tried to run the AC diagnostic test? if not definitley start with that, heres a copy pasta from AUS board and the link to it:

http://www.skylinesaustralia.com/forums/R32-A-c-Cold-t93814.html&hl=climate+diagnostic

this is for those of us who have eratic a/c operation
(somtimes cold but not all the time)

your ac has a self diagnosis feature you can use.
leave car undercover for a while.(60+degree interias dont help this test)

turn ignition on and start the engine, within 10 seconds hold the off button down till

1.the whole display lights up.(diag mode)to test the display.

2push the heat button now .if the ac has a major fault the code number will fash. if its ok 20 will be displayed.

3. push the heat button and 41will be displayed. this is the vent and fan test. while in this section u can run thru 41 to 47 by pushing the ambient button. the vent and fan speeds should go thru there differant stages. + ac comp.

4.THE IMPORTANT STEP push the heat button. this test runs thru the 4 temp sensors that are used to regulate the compressor outlet(coldness)
the 4 sensor temps are displayed in this order. by pushing amb.
outside
inside
air intake > (before evaporator temp)
refrigant temp.>( evaporator temp)

the outside and inside should be about the same.(leaving car in sun depletes this test)
the intake and refrigant temp should be the samish.
any masive variation between the two will cause the ac to stop working properly.

for example: mine was showing 28.5, 31.5,-23.5,10. (this is withe the ac running in the previus test(41-41etc)
clealy the car is not sucking in -23.5 degree air from the base of the winscreen!
now i know why the ac turns on and cuts out after a miniute or so.. it thinks its already cold so why run!
to fix this its a matter of replacing the sensor of concern with an apropriate thermister of the same value.

have a play with it and youl soon begin to understand how the climate control works. to make the most of it the car has to be at an evan temp on a coolish day out of the sun.
with the car running or if the ac cuts out while your driving along, quickly pull over and turn off the car and re start it. run through the diagnostic steps till step 4. the temp sensor test.
check them and if ones out of the ordonary thats the fault.(they might read ok at room temp,but can be overly sensitive(as with mine)

depending on interest on this il go into the 10 or so common fault codes you can get in step 2,and the rest of how to fix them.


ps. to revert back to normal ac just push the auto button

[cobrAA]

I did that test this summer and it said it was in perfect order LOL...

Now, I can't do it anymore because my car is stored.

Maybe my sensor *****ed netween the time I did the test and now but the fact that my ac wont turn off or freeze is still a sign something is wrong. Should I really try to fix it? I think it's easier to simply buy another unit..

[morhart]

If your throwing your control unit out, I'll take the light socket from it Heres what it looks like http://forums.gtrcanada.com/general-...rol-light.html