Automotive Air Conditioning Information Forum

Doesn't matter how much you put in it-- it all will come out via your serious leak.....o psi means you are completely flat-- would you just add air to a o psi tire and run with that? Expect to find and fix your leak if you want it to cool.

You can try--- 65% of all mobile a/c failure is due to loss of refrigerant due to a leak- according to my 5,000+ database- so you play the odds...but to be sure you must have the factory specified amount of refrigerant in the system before you even consider reading pressures....My first step is ...

Recover charge, remove lines to TXV, remove TXV from Evap inlet, replace with new one- mount lines, evacuate system for 15 minutes, and recharge to factory spec- should take 30 minutes max. if you have a recovery, recycle, recharge machine available.

How do you know you have a bad TXV? The most ...

Never seen one go bad---but if there is dye there- it did not get there any other way- but a leak---change it out..

It is my experience that all relief valves are universal- will fit most any compressor- threads are the same, o-rings match...try a used one off a scrap compressor- or a core compressor at the dealer...should work

If you put sealer in it--no respectful mechanic will work on it-- they do not wish to plug up their expensive recovery equipment....

A leak that big can be easily found with a good sniffer, dye and black light with UV glasses...

One can only hope you have shut off the valves on the gauge set after charging-- otherwise you have created a bypass through the gauge set.....

I've seen two orifice tubes in similar units, and also have seen no orifice tube in front- it was missing- put one in, in the proper location and all was fine. Look for the OT dimples at a connection behind the tee-- also look for an OT in condenser outlet connection- there should NOT be one there ...

Why do you suspect expansion valve- ? when the number one cause of automotive a/c failure is loss of refrigerant due to a leak? Check your refrigerant charge by having it extracted and weighed and compared to factory labeled amount for your system. That is always the first diagnostic step. You ...

Don't use a test light - use a DVM - digital volt meter- and check the three wires as referenced below- do you get signal confirmation?

black wire is ground
gray wire is 5volt reference or feed
red wire is the return voltage which is proportional to refrigerant pressure- should vary with pressure ...