Assess the causeFollow the evidence.
Check blockages, impeller condition, wiring and the command reaching the pump.
The exact model and operating conditions determine which tests apply. These are possible inspection directions, not a list of components that must be changed.
Before the appointmentKeep the useful details.
Mention whether draining works sometimes and whether the filter was recently cleaned.
Record the timing, previous work and accessible model label. Do not remove covers or handle live, refrigerant or pressurised components to obtain information.