your a/c is having a hard time to cool the cabin when the engine is hot. Most probably mahina yung aux fan sa malaking condenser yung malapit sa radiator or madumi na.
Yung sa akin is we replaced all the condensers. We oversized the smaller condenser from 12x18 to 14x18, then placed a larger aux fan then yung malaking condenser from 12x21 to 12x23 while retaining the original aux fan. We had to custom made the brackets. Also, we adjusted the expansion valve to open at 75-80 psi so as to avoid high pressure on the system. Vent temp is at 2-4 degrees both front and back. Cabin temp at high noon is at 18 degrees. Compressor cut-off interval is at 8-9 mins
Original compressor: HCC(halla) fs-10, eaton expansion valves, 12x23 and 14x18 laminated condensers, surplus auxillary fan from 2004 kia sorento.
So far i'm very satisfied with my unit.





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