Is the evaporater core located behind the dash where they expansion valve is? Anyone else have Ac problems? What did you do to fix it?

 

What kind of problems are you having?

 

I just had the the ac recharged like two weeks ago and now it just blows hot air its leaking somewhere. Im guessing its either the evaporator core or the expansion valve. I know you half to take out the glove box and part of the dash to get to the exp valve/evaporator core. I just want to see if anyone else has had this problem and how hard is it to get the dash and glove box off.

 

The evaporator core is located above the glove compartment area. You have to remove it before accessing the core area. Its not that hard to get to. Have someone test for leaks before you trouble shoot the problem. It could also just be a temperature control switch problem.

The first recharge lasted about two weeks, then only warm air was present. The shop replaced a leaking compressor hose and temp control switch.

Also, before recharging, did the technician first purged your AC system of moisture? I converted from freon to 134a, been working great for about one w/o problems.

 

there was a real good thread about ES-12, an R-12 substitute that mixes with r-134a going on last summer. ES stands for environmentally safe, but this stuff cools better and the molecule size is bigger than R-134a so it's more resistant to leaks.

the thread was going on last summer, Dave Newbern hooked me up.

yes the evaporator is quick to remove, undo the heat shield for the ABS, but before you do that,

do you see fluid in your sight glass? does your air pump (yes airpump, not a/c) engage at idle? do you have pressure on your lines? check by release a little air from the high pressure side (thinner tube) schraeder valves (guys correct me if I'm wrong)

or if you have a pfc? move the fan switch to 3 and a half and jiggle it.

I'll check back.

 

Thanks Dan, never heard of ES-12, if I don't need to drain the AC oil(contamination?), then I'll try it. Also noticed that 134a does not cool as well as the original Freon.

 

did you find the thread? you don't need to drain.

got pressure?

 

You can use:
1: ears to listen for the leak
2: leak detector dye for visual leak finding
3: freon gas sniffer to locate the leak

Convert the system to 134 valves and use AUTOCOOL refrigerant.