i have a 1985 mercedes 380 se.iput a new ac compressor on and a new dryer.also new suction lines.filled it with freon and it wont coll down. still has plenty of freon.there is a bluel line looks like high pressure.from the dryer thru the dash can any one tell me is that line supposed to get cold with the air on.before i changed every thing it did in fact it frose up.where you put the freon in the suction line is very cold.any help will be appreciated.thank you.
Incoming search terms for the article:
Related Benz News
Accessories March 1st 2011
March 1st, 2011 at 1:42 pm
Check the orifice. It may be clogged with stuff from the original dryer.
March 1st, 2011 at 2:03 pm
If the system was not evacuated to remove all the air in the system is a problem, air will compress but wont condense and turn to liquid like the freon. any air in the system will hurt the performance. It also could be your ‘expansion” valve is plugged. You will have to check with the dealer or a good A/C shop to find where the expansion valve is located in your system. But if you didn’t evacuate the system i would try this first, you will have to dump the charge to then place the system into a deep vacuum.
edit … If you have a real set of freon gauges on the vehicle you will know if the expansion valve is plugged because you will be running higher than normal head pressures and real low suction pressures. With out a good Gauge manifold which reads the hi and low side pressures the system is almost impossible to diagnose
March 1st, 2011 at 2:19 pm
R-UNUTS is correct
March 3rd, 2011 at 8:12 pm
Maybe it’s better if you ask for a help to an expert. Contact your local auto services and your problem will surely solve.