Assess the causeFollow the evidence.
Check tap supply, hose routing, inlet screens, valve operation and level-sensing controls.
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.
Describe whether the problem affects every programme and whether the household tap has water.
Record the timing, previous work and accessible model label. Do not remove covers or handle live, refrigerant or pressurised components to obtain information.