[shovett]

thank for the rply..

The car had been in the sun for a long time, and the test was run with the windows up. The temperature in the car was about 35c according to the gauge.

I'd like it to be too cold..I could then turn it down..

It seems that as soon as the aircon has to work hard it just doesn't perform.

would this mean the gas is low?

[Phil №❶]

Under those conditions, a reduction from 35 Deg C to 10 Deg C in 1 pass through the evaporator, is pretty effective cooling. I guess the only real way to determine if the system is operating correctly is to connect pressure gauges and check that it is within specifications and the thermostat which controls the compressor is also operating correctly. It may just be the characteristics of the refrigerant.

Note, the fastest way to cool, a car which has been in sunshine, is to lower all windows and drive the car with AC on and remove the superheated air from the interior and AC pipes, then close windows and let the AC do it's job. You will waste fuel and work the AC harder, if you don't follow this procedure.

[shovett]

the temp drop was in the vent not in the car itself. The gauge I have goes into the vent. It does reduce the temp in the car but not to 10c. I am taking the car to get it tested by an idependent aircon garage tomorrow.

[Phil №❶]

Yes, I realize it was the vent temp.

[Dazzler]

the temp drop was in the vent not in the car itself. The gauge I have goes into the vent. It does reduce the temp in the car but not to 10c. I am taking the car to get it tested by an idependent aircon garage tomorrow.

Good idea, sounds sub-par to me...

[Shambles]

I'd be measuring the pressure at the low AC rail. Too high = bad, too low = bad.

Let us know what your aircon specialist says...

[CraigB]

 

[shovett]

okay..tests done. It seems I have a sticking TX valve..worked well then stopped cooling.

[Phil №❶]

Ok, at least you know what's wrong now. 

[shovett]

I just need it to stick when it goes back to Hyundai.

[Phil №❶]

Bet it doesn't 

[Dazzler]

I just need it to stick when it goes back to Hyundai.

Loctite 401 is good...