Grundfos Grundfos Pump Error Code 13

Grundfos Pump Major Communication

Model: Grundfos Pump | Code: 13

Applicable Systems
MAGNA1

Symptoms

Communication fault. The pump controller cannot communicate with an external system or module.

Possible Causes

  • Communication cable damaged or disconnected
  • Communication module hardware failure

Troubleshooting Steps

  1. Step 1: Check the communication cable and connections
    Cable is secure and not damaged
  2. Step 2: Verify the communication module status and addressing
    Module is not responding

How to Reset

To reset: Fix the cable or module issue, then reset the controller.

Related Grundfos Fault Codes

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Source: Grundfos Pump Troubleshooting Guide, Grundfos Group

Category: Pump

Published: 2026-10-04