What causes Junkers error 238?

Faulty fan wiring or plug connections. Defective fan component. Dirt or blockage in the fan

How do you fix Junkers fault code 238?

1. Check the fan wiring and plug connections for stability and damage. 2. Inspect the fan for any dirt and blockage, and clean if necessary. 3. If necessary, replace the fan to restore smooth operation.

238

Code 238 - Fan runs irregularly during start-up

Junkers · Cerapur 9000i Boiler

What does 238 mean?

The fan (blower) shows irregular operation during the start-up phase of the boiler. This is an interlocking fault.

Common Causes

Faulty fan wiring or plug connections
Defective fan component
Dirt or blockage in the fan

Repair Steps & Checklist

Click steps to track your progress.

1
Check the fan wiring and plug connections for stability and damage.
2
Inspect the fan for any dirt and blockage, and clean if necessary.
3
If necessary, replace the fan to restore smooth operation.

Browse all codes in this manual (48)

Verified technical data. Last updated: April 2026

Source: Junkers Cerapur 9000i Boiler

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Code 238 - Fan runs irregularly during start-up

Code 238 - Fan runs irregularly during start-up

What does 238 mean?

Common Causes

Repair Steps & Checklist

Related Faults