Quote:
Originally Posted by jhtanglewood
How hard is it to convert a system back to R12?
When it's over 90° here, my new R134 system struggles unless I'm barreling down the highway for 30+ minutes.
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You have other problems then. Likely the recirculation flap isn't working and/or your charge is incorrect. R134a is less efficient than R12, but it isn't THAT much less efficient. It's been in the mid 90s and extremely high humidity for this area lately from all the rain, even with that, after sitting in the sun all day and getting heat-soaked, it only takes my SD about 5 minutes to pull the cabin down and start blowing ice cubes on R134a on the stock system.
Charging a converted system is an art, not a science. If you just dump in a weighed amount that some Internet armchair "expert" claimed was right, you'll be wrong, guaranteed. You'll be under or overcharged, neither of which lend themselves to good cooling.