Panasonic Short Cycling / Flow Detection Dropout

Water heater produces hot water but then shuts off after a few minutes, requiring tap to be closed and reopened.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Flow rate dropping below minimum, Clogged inlet filter, Faulty flow sensor, Overheat thermostat tripping

Comfort and safety: Short cycling can lead to temperature swings.

1. Maintain adequate flow:
- Open the hot tap more fully.
- Clean aerators and shower heads.
2. Clean inlet filter: Ensure the inlet filter is free of debris.
3. Check for overheating:
- If water is extremely hot before shutdown, the overheat thermostat may be tripping; descaling may be required.
4. If issue continues: Have a technician test the flow sensor and overheat thermostat and replace as needed.

Medium 3/5

Water Flow Sensor Assembly

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