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Pump not running

Pump not running when power is on

Wilo · Yonos PICO Pumps

What does Pump not running mean?

The pump is not operating even though the power supply is switched on. This could be due to a fuse issue or a power interruption.

Common Causes

  • Electrical fuse is defective
  • Power interruption
  • Pump has no voltage

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check if the electrical fuse for the pump has tripped or is defective.

  2. 2

    Verify that the power supply to the pump is active.

  3. 3

    Ensure there are no power interruptions in the building's electrical system.

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

Related Faults

Bars bottom to top blinkBars bottom to top blink - Pump venting function activeBuilding does not get warmBuilding does not get warm - Heating output too lowE04E04 - Undervoltage detected
Source: Wilo Yonos PICO Pumps
Open Manual (Page 19)Search more codes in this manual