Thread: Air conditioning not cold

Hi Steve, one or more of the blend motors may be part of the problem. But with a 20 year old aircon system it could literally be anything or a combination of problems.
My advice would be to get it diagnosed with a test unit to see what fault codes it throws up.

Originally Posted by DieselLSE

Hi Steve, one or more of the blend motors may be part of the problem. But with a 20 year old aircon system it could literally be anything or a combination of problems.
My advice would be to get it diagnosed with a test unit to see what fault codes it throws up.

I am thinking along those lines as well

I have replaced all the hoses and the condenser and receiver drier about 9 months ago, so I know some parts are good

It's not showing any codes in the nanocom, so perhaps it needs to be hooked up to a more specialised machine

Thanks
Steve

Steve

I am also of the opinion that professional help may be needed here. The trial and error method can get very Costly! The fact that you state that the condenser is not getting cold I would have thought lack of pressure. Thanks A/C specialists can do a these for gas. It may be a leaking hose are any other component as far as that goes. The clutch is engaging but is there any chance it could be slipping? If you have any spacer shims on q the clutch you could try removing one and see if it rectified the problem. Other than that seek professional services.

Good Luck!

Well what a coincidence. I bought some 2nd hand HEVAC servo motors from pommyland, a TX valve from work and some Hychill minus 30 from Bursons.

I'm halfway through the job with some emergency home made heater core orings (tested 100% OK) and fitting the dash back in.

Mine had the same symptoms as Steve and it was low on gas as I had a leak in the evaporator. It was a very gradual decline with that pungent stink from the air con oil coming through the vents.

I'll report later on today.

Well I can say that the re gas was a success! This Hychill stuff is very much like the old R12, I've never had a later model car with such cold air before.

Sorry for the slight hijack Steve.

Hello Steve
If your problem was in the control system i.e. Trinary (tristate) switch the clutch would not be pulling in. Are the condenser fans in front of the radiator running? Is there air coming out of the vents? Is the dreaded A/C symbol displayed on the A/C control panel.

Something's not right if the clutch is pulling in and the suction line isn't cold and sweaty.
At the same time the liquid line should be a bit above ambient and the discharge line too hot to touch with a few revs on the engine, fan set at high.

You need someone qualified to put gauges on and see what's happening. Without them you are blindly guessing.

Thanks for the comments everyone, we had a good look around all the wiring etc and there is nothing which appears to be out of place.

Definitely time to get a professional to look at it. It was cold one day and not the next, in typical P38 fashion it decided to wait until the weather got really hot before it stopped playing !

Steve