Air Conditioner Problem
I hope someone can shed a little light for me.
2003 Grand Cherokee Larado
original a/c system, evaporator replace when vehicle was a year old
nothing has been touched since vehicle has 40K miles
A/C worked fine till the beginning of summer. It blows cold when the vehicle is first started and driven, but if you turn it off and and restart, it won't cool very well. From start vent temp is a consistent 40°. On restart it won't go below 60°.
I live in the desert and had to drive to LA a few weeks ago and the a/c started out ice cold and then slowly lost it's cool. It's been doing that pretty consistent now...starting out blowing cold and then losing it's cool.
I connected a set of gauges this morning and here are the readings:
93° with 11% humidity
static pressure was about 100 low side 350 high side (I think..forgot to write them down)
after the Jeep had warmed up the readings were 33 low side and 240 high.
The high side did fluctuate a little with higher engine RPM's up to 250 and the low at one point went to 35. When the vehicle was at idle the readings held steady at 33/240. Clutch cycled as normal at higher RPM's.
The recycle door works fine. When you turn the temp to hot it blows hot and when turned back to cold it blows cool. It's a Laredo so I don't think the issue with the blend doors is a problem like on the Limited's.
I think it just needs a shot of r134a, but just wanted to pick someone else's expertise before adding. Maybe it's a start to a much bigger problem. Desert heat is killer so a properly working a/c is a must. And help is greatly appreciated.
Before I forget, thanks to all who post here. It has helped many times getting me out of a jam with my Jeep. I have learned a lot and hope someday to have a trip or trick that I can post to help others!