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E026

E026 — WSK or PTC interrupted

Wilo · VeroLine and VeroTwin Pumps

What does E026 mean?

The connection to the WSK (Winter Service Kit) or PTC (Positive Temperature Coefficient) sensor has been interrupted, usually indicating a motor fault.

Common Causes

  • Motor is faulty.
  • Interruption in the wiring to the sensor.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the pump's power supply.

  2. 2

    Inspect the wiring associated with the PTC or WSK sensor for breaks or loose connections.

  3. 3

    Contact customer service, as this error typically indicates a motor issue requiring professional attention.

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 51)Search more codes in this manual