Portable AC shows P2 and stops cooling intermittently.

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

Upper tank full, blocked internal siphon between tanks, faulty upper tank level sensor

Safety: Unplug the unit before draining.

Steps:

Consult manual: Some Klarstein models have separate upper and lower drains. Identify the correct drain plug for the upper tank.
Drain upper tank: Remove the plug and drain water completely.
Check internal siphon: If accessible, ensure the internal tube between upper and lower tanks is not blocked.
Sensor check: Inspect the upper tank level sensor or float for free movement and intact wiring.

If P2 persists, the upper tank sensor assembly may need replacement.

Medium 3/5

Upper Tank Level Sensor

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