Here's another explanation. http://www.auto-repair-help.com/automotive_maintenance/ac_expansion_valve.php
...thanks... it looks like my...new expansion valve...is bad. I don't know what a bad one would do, but the Guy at the A/C shop said mine may be...stuck open...stuck closed...stuck in between... with the gauges hooked up and I start the car...the low side goes to 32...as the car runs for 2-3 mins. it drops to 16...
Effie and I got the valve swapped...thanks Sweetie... pulled a vac. on the system and if it holds over night I will charge it again tomorrow...5 times in 3 weeks...
...well that didn't work...still 16 on low side...vent temp 65 degrees... will get back into it tomorrow... ...bought a case of 12 oz cans of 134A this time...
I have...16 at 12 ozs. system calls for...24 ozs. I have put up to 36 ozs. and the low stays the same. the high side goes out the top and bumps the high off limit ... Effie thinks I need professional help... what does that have to do with my A/C system...
something different today... car ran with A/C on max for 5 mins...low at 12 the compressor loaded up, the low went to 32 for about 1 min. then compressor cycled off/on and it went back to 12. it ran for about 3-4 mins then did it again except when it cycled off it didn't come back on for 1 min... ...I thought compressor didn't cycle in max air position... high side up/down with the trinary switch cutting fan on/off...(186-254)
this may not be a good thread to subscribe to...my stuff seems to act a little different than others...
Did you get all the oil out of the system somehow and put the correct amount back in? Does your expansion valve have a heat/cold sensing bulb that you can get at? Can you put some warmth on it and see if that causes it to open and let more refrigerant into the evaporator?
