Random AC question

jbc426 said

Another thing to change if you are switching to R-134, is to install a larger multi-pass, parallel-flow condenser designed specifically for R-134 and always change the receiver dryer when the system is opened

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Yup. I did the R12 -> R134a swap on my truck years ago, and as a Commercial HVAC guy I knew I was supposed to change-out the condenser coil.

But I was lazy, and I didn't, which was a mistake on my part, as I had head pressure issues from Day One with the R12 condenser.

Live and learn, I guess.