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10

10 — Short circuit on outdoor temperature sensor

Viessmann · Vitodens 200-W B2HB Boiler

What does 10 mean?

The boiler is operating based on a default outdoor temperature of 32°F (0°C) because its outdoor temperature sensor has a short circuit.

Common Causes

  • Short circuit in the outdoor temperature sensor
  • Damaged wiring to the outdoor temperature sensor

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Visually inspect the outdoor temperature sensor for any visible damage or corrosion.

  2. 2

    Check the connecting cables of the outdoor temperature sensor for any signs of fraying or shorting.

  3. 3

    If the fault persists, contact a qualified heating technician to test or replace the outdoor temperature sensor.

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

Related Faults

0F0F — Boiler requires service1818 — Outdoor temperature sensor cable broken1A1A — Flow sensor 1 faulty
Source: Viessmann Vitodens 200-W B2HB Boiler
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