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EMERGENCY OPERATION BOILER TEMP. 70°C

EMERGENCY OPERATION BOILER TEMP. 70°C — Manual operation / Emergency mode active

Junkers · Cerapur 9000i Boiler

What does EMERGENCY OPERATION BOILER TEMP. 70°C mean?

This display indicates the boiler is in manual or emergency operation, with the boiler temperature set to 70°C. This mode allows the device to continue running with a set boiler output, typically used for a few days if the control unit is not functioning properly.

Common Causes

  • Manual operation has been activated.
  • A fault in the main control unit requiring emergency bypass.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify if emergency mode was intentionally activated.

  2. 2

    To switch off manual/emergency mode, press the 'c' button.

  3. 3

    If the boiler frequently enters emergency mode, contact a qualified specialist.

Browse all codes in this manual (48)
Verified technical data. Last updated: April 2026

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Source: Junkers Cerapur 9000i Boiler
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