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Pump making noises

Pump making noises - Potential cavitation

Wilo · Yonos PICO Pumps

What does Pump making noises mean?

The pump is making unusual noises, which could indicate cavitation. This happens when there isn't enough pressure in the suction line.

Common Causes

  • Cavitation due to insufficient suction pressure
  • System pressure too low

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Increase the system pressure within the permissible range.

  2. 2

    Check the delivery head and reduce it if necessary.

  3. 3

    Ensure the system is properly filled with water.

Browse all codes in this manual (17)
Verified technical data. Last updated: April 2026

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Source: Wilo Yonos PICO Pumps
Open Manual (Page 19)Search more codes in this manual