Just picked up a ‘92 with A/C that’s blowing warm. I forgot to save the FB ad that listed all the parts that had been replaced, but I remember there were a couple A/C bits on there. Checked under the hood and the black can has a sticker that says R12 on it, but the port next to it looks like it’s been changed to an R134. Is there anything else I can check to see if this has been converted to R134?

 

Congrats on your old truck purchase!

That fitting shown really only indicates that a quick-connect fitting has been installed on the older screw-on fitting, not that anything has been converted, refrigerant wise.

From the looks of the hose running along the firewall and the fact that the original sticker is on you accumulator/dryer, this system probably hasn't been converted to R134a. Depending on your budget, it wouldn't be that hard to bring it up to date with all new parts (to include hoses) and get you some cold air blowing again.

Do you know anyone around that could help ya out with that?

 

That’s kind of what I was wondering. To be honest, there’s a pretty reputable shop here and I may just take it there. One, so they can give it a good once over and see what they have to say about my to-do list, and two, so they can check the A/C in case someone just replaced that fitting and tried to recharge it with 134 without actually converting it.

 

Would be suspicious of everything.

The connector is the R134 style, the older R12 were threaded connections.

Without further information, and the given dryer pic - no definite idea what happened, as a true conversion from wayback involved changing the dryer, changing the o-rings, installing the fitting adaptors, flushing the system, changing the compressor oil, and replacing the orifice tube, plus a sticker to be applied showing the conversion (yeah, I know, the sticker-thing documentation brings on the eye-rolls and smirks).

If you're not familiar with A/C systems, would highly recommend having the shop check things over, as you mentioned.

 

Never had to mess with A/C before. I took a quick look at the compressor. There was a sticker, but I couldn’t read it.

 

Were not the orings suppose to be changed to green? if and when converted?

 

That was the directions given when I did the conversion in the late 90s, unsure how things evolved through the years as more experience was gained between what was initially recommended versus what was learned from experiences as an absolute have-to.