Customer was not home when I arrived. Customer left the unit running. Pulled out the disconnect to clean the condenser. Clean the condenser from inside out with chemical and water. For the condenser back together and plug them back in to take pressures. Pressures were good but for some odd reason I'm getting zero subcooling. Temperature difference from inside the house is 32°. Went to the attic and noticed that the P-trap for the condensation line was blocked off. Blew out the blockage. Check the evaporator coils and fan blower everything was good. Change filter. Gave customer information/ status of unit, customer acknowledged and signed off.
