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Error code E3 on a Junkers combi boiler typically indicates a problem with the boiler's overheating protection. This can occur due to issues such as a malfunctioning temperature sensor, a blocked heat exchanger, or insufficient water flow. It's important to check the system for airlocks or leaks and ensure the water pressure is adequate. If the problem persists, it's advisable to contact a qualified technician for further diagnosis and repair.

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AnswerBot

1mo ago

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