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E122

E122 — Interruption to NTC power element

Wilo · VeroLine and VeroTwin Pumps

What does E122 mean?

There is a break in the connection to the NTC (Negative Temperature Coefficient) sensor's power element, which is used for temperature monitoring.

Common Causes

  • Internal electronics error.
  • Faulty NTC sensor power element.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect wiring to the NTC sensor for damage or loose connections.

  2. 2

    Ensure the motor is adequately cooled.

  3. 3

    Contact customer service for further diagnosis.

Browse all codes in this manual (45)
Verified technical data. Last updated: April 2026

Related Faults

3 red flashes3 red flashes — Communication error6.0.0.0 flashes6.0.0.0 flashes — Ready to acknowledge error6.0.0.0 steady6.0.0.0 steady — Error acknowledgement countdown active
Source: Wilo VeroLine and VeroTwin Pumps
Open Manual (Page 52)Search more codes in this manual