Hi tizzy. are you speaking about the rear expansion valve? if the front vents are cold then the front expansion valve is working,,right?

 

Correct. Most of the oil drops to the lower lines taking most of the crap with it. Which is why when a compressor grenades, the rear h-valve is usually the first to plug up.

 

Replaced valve evacuated and filled system. Everything is running just right. Thanks to both of you for all of your advise. Much appreciated.

 

Well I am certainly glad everthing if fine now. You replaced rear expansion valve, but i still don't understand why the line going to the expansion valve was not cold when you touched it prior to going to the expansion valve. Anyone explain that?

 

As tizzy had said. If the debris travels thru the lines. Ends up the H-valve or expansion valve, then you don't have any flow. Then the A/C system can't compete its cycle from gas to liquid. Then both lines would be warm.

 

correct!! No flow, no cold. If the lines get cold, the valve is most likely working.

 

Thanks for the info. I am learning, just takes time, lots of time, at least for me.