On arrival checked thermostat was calling for cooling. Measure EWT, LWT, EWP, LWP, delta P, delta T, return, and supply air Temperature. Measure amps,voltage, inspected contactor,voltage absorption system rated for 40, actual 40.1, filter is clean(28x30x2), blower wheel is clean as well as the evaporator coil. Checked operation and system is running correctly.