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E033

E033 — Intermediate circuit overvoltage

Wilo · VeroLine and VeroTwin Pumps

What does E033 mean?

The voltage within the pump's intermediate circuit is too high, likely caused by fluctuations in the mains power supply.

Common Causes

  • Voltage fluctuations in the mains supply.
  • Electrical installation issues.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Monitor the mains voltage to detect fluctuations.

  2. 2

    Have the electrical installation checked by a qualified electrician.

  3. 3

    Ensure the power supply is stable and within the specified range.

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