Thread: Air Conditioning not working, help required..........

Grasping at straws here, since the A/C guy said my compressor isnt work properly could this be a symptom of the evaporator temp sensor being dirty of buggered??? and not telling the compressor to fire up properly.
I have a can of air flow meter spray if i could find the sensor would i clean it with that?

Hi Mick,
So went to Southerns, the young guy there who is great checked over the system couldn't find any leaks, however washing the engine bay does wash away and residue left behind when the system leaks, something I didn't know.

The system had a vacuum check for twice as long as normal and nothing was revealed, however when purging the system he did comment that there was next to no gas in the system, not enough to allow the compressor to activate anyway, so the theory about having enough gas is a reality, if the system doesn't have enough it will not work.

Maybe the air con gent who came to the house had residual pressure in is lines, the gauge when I looked at it today showed very little. The gas that has been put in now has a dye in it that can be seen with a black light torch, makes it easier to find the leak, if there is one.

So end of this little tale, air con is working, no leaks, looks like the gas level was just to low to initiate the compressor, have to see how it goes from now. Thanks for all the suggestions and ideas.

The cheapest way to maintain an aircon is to run it.Even if it means setting the climate control higher than need be.Those who turn the AC off to save fuel are wasting money in the long term as AC work is more expensive than fuel used due to seals drying out and allowing the gas to escape.
Andrew

As this compressor doesn't have a clutch it is always running so no need to remember to look after the seals.

I wonder where the gas went ... very mysterious ... reminds me I should get mine regassed to see if it makes the compressor quieter.

Hi Mick,
The assumptions were that either:

The guy didn't use the air con and therefore never noticed, hard to imagine with a black car.
A very small leak over a long period of time, and again never noticed the drop off in performance.
The compressor seal separated and re-seated........a long shot

Will be interested to see which of those if any turns out to be the case. Good luck !

Out of interest, what did they charge to diagnose and regas ?

Hi Mick,
$230