[DinoSorcerer!]

I jumped the low pressure switch and the compressor and secondary AC fan both kicked on. I'd have to assume everything is working nicely. However, I must convert it to R134a. I poked both ports on the compressor and not a thing came out. I'm sure it's dry of all the old R12, but the oil is probably still in it.

Has anyone converted and how did they do it?

 

[Jim Mesthene]

Find and fix the leak that emptied it in the first place.
Buy (at your local parts store) and install the $30 conversion kit.
Adjust the Capillary Tube on the Anti-Frost Switch (search).

I've done it at least 100 times, it works fine.

 

[turbo1992]

My anti frost switch was bad so I bypassed it...used it all of last summer without ill effects. Should I replace the switch to avoid any problems in the future? I only run it in the very hot summers down here and usually keep the recirc off.

 

[Jim Mesthene]

If you're in a part of Florida that has very low humidity, you might get away with it.

 

[Jesda]

I've been using Freeze12 for years. Its an R12-compatible alternative for $10 a can. Works great. No compressor oil change necessary.

Though last week I just bit the bullet and paid $250 to top off with R12.