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Green light middle flashing

Middle green light flashing continuously — Communication attempt from Grundfos GO or another pump

Grundfos · MAGNA3 Circulator Pumps

What does Green light middle flashing mean?

The green indicator light in the middle of the Grundfos Eye flashes continuously. This signifies that Grundfos GO or another pump is trying to establish communication with this pump.

Common Causes

  • An external device (Grundfos GO app or another pump) is attempting to connect wirelessly.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    To allow communication, press the [OK] button on the pump's control panel.

  2. 2

    If you are not trying to connect, ensure no other devices are inadvertently attempting to communicate.

  3. 3

    Verify the Grundfos GO app on your device is not accidentally trying to connect to multiple pumps.

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