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EC

EC — Parameter fault during calibration

Viessmann · Vitodens 200-W B2HB Boiler

What does EC mean?

The burner is in a fault mode due to a parameter fault that occurred during the calibration process.

Common Causes

  • Incorrect or corrupt internal parameters
  • Faulty boiler coding card

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Press the reset button 'R' on the boiler.

  2. 2

    If the fault persists after resetting, contact a qualified heating technician.

  3. 3

    A technician may need to replace the boiler coding card and then press the reset button 'R' again.

Browse all codes in this manual (56)
Verified technical data. Last updated: April 2026

Related Faults

0F0F — Boiler requires service1010 — Short circuit on outdoor temperature sensor1818 — Outdoor temperature sensor cable broken
Source: Viessmann Vitodens 200-W B2HB Boiler
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