I got my new expansion valve and finally got the old one out. The new one is labeled "R134a"
Can I use it?
I'm sticking with R12, and the valve appears identical except for the thermal thing (forgive the ignorance here) on the side. If there is any difference, I'm guessing that the "R134a" valve regulates to a different pressure/temperature.
So do I need a R12 exp. valve?