Preformed 1 system cooling maintenance. Met homeowner outside, he had no concerns at the time of arrival. Proceeded inside garage for attic access, tested all electrical components inside all tested within manufacture specifications. Changed filter 20x25x1. I noticed the client does not have a primary safety float switch and blow out valve. Left estimates for each. Client did not want to go forward with at this time. Treated primary drain line with total c. Proceeded outside to check all electrical components, start and run amps of the fan and compressor motor. All electrical components tested within manufacture specifications. Run and start amps tested within manufacture specifications. Rinsed out door coils Temp drop across the inside coils is 20 degrees 74 coming in 54 coming out. Unit was cooling upon departure.