For the super tune-up I inspected the air handler and condenser. All equipment was measuring within manufacturer specs and running well. Customer had a full switch on the drain pan however no water safety on the primary drain line. I recommend getting a float switch put on the primary drain line, a compressor saver, surge protection with the kind of system they have to protect it. Lastly their system is approximately 4 years old and there's already dust buildup in the supply plenum and blower wheel therefore I recommend a Aprilaire media upgrade kit. Customer said he'll talk it over with his wife and call the office and they decide to move forward.