Junkers Maximum Temperature Limitation / Overload Protection

P2 displayed; unit may limit output temperature or shut down under high demand.

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

Heat exchanger partially blocked, Insufficient water flow at high power, Incorrect power setting, Faulty temperature sensor

Safety: Allow the unit to cool if it has overheated.

Increase flow: Open the hot tap further or reduce mixing with cold water to increase flow through the heater.
Clean scale: If in a hard water area, arrange for descaling of the primary heat exchanger.
Check power setting: Some Junkers models allow limiting maximum power; verify it is set appropriately for your installation.
Service check: If P2 recurs, have a technician verify sensors and heat exchanger condition.

Medium 3/5

Primary Heat Exchanger

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