What causes Junkers error Flow Noise?

Incorrect pump output or pump map setting. Air in the system. Insufficient water flow

How do you fix Junkers fault code Flow Noise?

1. Set the pump output or pump map correctly and to maximum output. 2. Bleed the heating system to remove any trapped air. 3. Ensure there is sufficient water pressure and flow in the system.

Flow Noise

Flow noise

Junkers · Cerapur 9000i Boiler

What does Flow Noise mean?

The heating system is producing noticeable flow noises, indicating issues with water circulation or pump settings.

Common Causes

Incorrect pump output or pump map setting
Air in the system
Insufficient water flow

Repair Steps & Checklist

Click steps to track your progress.

1
Set the pump output or pump map correctly and to maximum output.
2
Bleed the heating system to remove any trapped air.
3
Ensure there is sufficient water pressure and flow in the system.

Browse all codes in this manual (48)

Verified technical data. Last updated: April 2026

Source: Junkers Cerapur 9000i Boiler

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Flow noise

What does Flow Noise mean?

Flow noise

What does Flow Noise mean?

Common Causes

Repair Steps & Checklist

Related Faults