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No lights

No lights on Grundfos Eye — Power is off or pump is not running

Grundfos · MAGNA3 Circulator Pumps

What does No lights mean?

The Grundfos Eye on the control panel shows no lights, indicating that the pump has no power or is not currently operating.

Common Causes

  • No power supply to the pump.
  • The pump is not running due to another issue.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the main power switch for the pump and ensure it is in the ON position.

  2. 2

    Verify the power supply cable is correctly connected and undamaged.

  3. 3

    If the pump still doesn't power on, consult an electrician to check the electrical circuit.

Browse all codes in this manual (21)
Verified technical data. Last updated: April 2026

Related Faults

10Alarm 10 — Communication fault29Alarm 29 — Forced pumping40, 75Alarm 40 or 75 — Undervoltage
Source: Grundfos MAGNA3 Circulator Pumps
Open Manual (Page 44)Search more codes in this manual