Today I came to Scott’s Okotoks home because the second floor air conditioning system doesn’t seem to keep up in very hot weather. Upon diagnostics of the 9 year old system I found the compressor, capacitor and contactor are all working well within manufacturers specifications. The outside fan is leaking oil indicating impending failure. The temperate drop was low at only 17 degrees. I tested the refrigerant levels and while I was testing the outside system shut off. I manually restarted the union found the pressures are incredibly high and are causing a safety switch to shut the system down to protect the compressor. I checked inside the outside condensing coil and found it is plugged. This must be cleaned before further diagnostics can be performed. Scott had to leave for a bbq but decided to have the outside coil cleaned while he was away. I have removed the condensing coil fan and housing. I treated the coils with acid coil cleaner, let the cleaners sit for 10 minutes, then rinsed.