[jrref]

Originally Posted by Bill14564

Thoroughly cleaning the drain line will greatly reduce the risk of it clogging.

Measuring the capacitor will determine whether it is about to fail and facilitate replacing it before it does.

Checking the delta temperatures will reveal if the system is functioning optimally and will initiate a conversation about replacement before a complete failure.

Inspecting and cleaning the evaporator coils will improve efficiency, reduce electrical usage/cost, and detect premature corrosion.

None of these will ensure that the system never breaks but they all lower the risk of it breaking suddenly in the middle of a heatwave.

Exactly