Originally Posted by pedrocamp

I am not familiar with R24. My system cools very nicely especially after performing one important, but time consuming job... pulling the dash, removing the evaporator from it's box and cleaning out the years of accumulated crud in the fins. At least 1/3 of the evaporator was completely plugged with fibers and debris. The 123 has no cabin filter so any floating particles can get sucked into the evap fins. Also keep in mind to check compressor oil requirement for the type of refrigerant you are using. I had to flush my Sanden and use R12 compatible oil.