Quote:
Originally Posted by Screwdriva
Think of R24 as a version of R12 that is still sold (atleast here in the UK). You described the one thing I have not renewed on the car - the evaporator. I'm not sure mine would have as much crud in it given the extremely low use but it is something I suppose I would need to cross off the list to be sure...
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If the evaporator is clogged, air temps will be lower, but airflow is reduced, limiting cooling in the cabin.
If you are experiencing cool air, stron airflow, but not much comfort in the car, an it is below 92F upside, AND the car is in motion, most likely, the system is overcharged. Have a shop remove a few oz from the charge, you don’t want the suction pressure to be above 38psi at idle…
I will add my vote to installing a micro channel condenser… at least a booster add on coil. 134 just doesn’t have the heat capacity of R12…
If R24 is a blend hc refrigerant, id go back to that.