Want colder A/C? Try power washing your AC condenser at the car wash.

[gregp1962]

I was at the car wash. On a whim, I washed out the AC condenser with soap and good water pressure while I had the hood open. I was amazed that it blew noticeably colder afterward. I'm thinking that 40 years of bugs and even more likely, a film of diesel particulates created an insulator on the condenser fins.

Beware not to let the excessive water pressure bend the aluminum fins. It won't do any good if the system isn't working anyway. Next week, I'm going to replace the serpentine condenser with a parallel flow one anyway. But, this was an amazing improvement!!!