Aircon Compressor Doesn't Stay On

[Richie33]

Hey guys, I need some help with the air con in my R33, I saw some other threads about air con but not this specific problem.

When I turn my air con on, the compressor turn on, idle goes up 800rpm, then a few seconds later the compressor switches itself off and idle drops to normal again. This happens driving as well, but obviously not as noticeable, except for the air not being cold. Thing is sometimes the air con works fine, esp. on the open road, and sometimes it won't stay on for a whole trip. When the compressor is on, the air is cold. It is really frustrating, on hot days I find myself playing with the controls all the time as I'm driving trying to trick the compressor into turning on.

Is it a sensor, if so which one and how can I fix it?

Is it a lack of gas?

Thanks

[buggor34]

Hey guys, I need some help with the air con in my R33, I saw some other threads about air con but not this specific problem.

When I turn my air con on, the compressor turn on, idle goes up 800rpm, then a few seconds later the compressor switches itself off and idle drops to normal again. This happens driving as well, but obviously not as noticeable, except for the air not being cold. Thing is sometimes the air con works fine, esp. on the open road, and sometimes it won't stay on for a whole trip. When the compressor is on, the air is cold. It is really frustrating, on hot days I find myself playing with the controls all the time as I'm driving trying to trick the compressor into turning on.

Is it a sensor, if so which one and how can I fix it?

Is it a lack of gas?

Thanks

I had the same problem in my 32, turned out being my compressor shorting out. It started off as you describe then only got worse untill it would only stay on for a minute or 2 then blow the fuse. I had to get a new second hand compressor installed. Not cheap unless you can do it yourself

[Richie33]

I had the same problem in my 32, turned out being my compressor shorting out. It started off as you describe then only got worse untill it would only stay on for a minute or 2 then blow the fuse. I had to get a new second hand compressor installed. Not cheap unless you can do it yourself

That's not what I wanna hear

Dunno if it's a fuse blowing, some days it works fine. But yeah it is getting worse... or is it just cause it's summer?

[tek_01]

mine has the same problem, not as severe i think as yours but same symptoms. AC will switch off before its time and than switch back on randomly (usually after about 30seconds or so) you can feel it while driving aswell

when i got mine re-gassed the guy said it is a sensor of some description thats behind the dash/glovebox area that senses the temperature and turns off the compressor because it thinks its reached the right temp

best to get an a/c to check it out.. he will tell u better than anyone on a forum

btw cost me approx 150 for a re-gas and new filter/dryer

[Jdfnq]

try putting it in diagnostics mode.....

this will give you an indication of what is wrong....

turn car on

hold the off button for 5 secs staright away.

this should put you into teh diagnostics mode.....

check the sensore by pressing the HOT switch (red triangle)

the readout will tell you if you have a problem

20= all is ok

21= outside air sensor

22= inside air sensor

23= water temp sens

24=intake temp sens

25= sunload sens

26=PBR

27= refridgerant temp sens.

hope that helps

[Jdfnq]

just did mine and found that my sunload sensor is f**ked.......

Oh well

[blind_elk]

just did mine and found that my sunload sensor is f**ked.......

Oh well

It's only f****d if you were parked out of direct sunlight. Try shining a torch on the sensor (little "button" on the passenger side of the dashboard, near the base of the windscreen).

[Jdfnq]

It's only f****d if you were parked out of direct sunlight. Try shining a torch on the sensor (little "button" on the passenger side of the dashboard, near the base of the windscreen).

was parked in the garage.....

that was what i was told to do as otherwise ^^^^

migt clean it though and see if that makes i difference

[noone]

even a cloudy overcast day will bring up the error code for the sun sensor I doubt that is what is causing your drama though almost sounds like it might just be a loose connector if the rest of the diagnostic check is okay is it or isnt it blowing the fuse? If it is could be the clutch coil on the compressor