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Ignition Too Hard/Bad

Ignition too hard, too bad

Junkers · Cerapur 9000i Boiler

What does Ignition Too Hard/Bad mean?

The ignition process of the burner is not optimal, described as 'too hard' or 'too bad', which can lead to ignition failures or difficult starts.

Common Causes

  • Incorrect gas connection pressure
  • Worn or faulty electrodes and cables
  • Defective ignition transformer

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the gas connection pressure to ensure it is within the correct range.

  2. 2

    Inspect the electrodes and their cables for wear or damage; replace if necessary.

  3. 3

    In the service menu, switch on the permanent ignition under 'FUNCTION TEST > ACTIVATE TESTS > IGNITION' and check the ignition transformer for misfires.

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

Related Faults

0.9 BAR0.9 BAR — Low operating pressure101Code 101 - Mains voltage lower than allowed1019Code 1019 - Flame formation after burner switches off
Source: Junkers Cerapur 9000i Boiler
Open Manual (Page 40)Search more codes in this manual