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3

Fault 3 — No boiler water circulation detected

Viessmann · Vitodens 200/222 Boilers

What does 3 mean?

The boiler has detected that there is no boiler water circulation. This means water is not flowing properly through the heating system, which can cause overheating and prevent the boiler from operating.

Common Causes

  • No boiler water circulation detected

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the heating system fill level and add water if necessary to reach the recommended pressure.

  2. 2

    Bleed air from your radiators to remove any trapped air in the system.

  3. 3

    Check the circulation pump to ensure it is running and circulating water.

  4. 4

    Press the reset button R on the boiler.

Browse all codes in this manual (33)
Verified technical data. Last updated: April 2026

Related Faults

2Fault 2 — No or low gas pressure detected29Fault 29 — Open circuit at power pump module terminals 1 and L30Fault 30 (Detailed 140) — Burner blocked due to boiler water sensor short circuit
Source: Viessmann Vitodens 200/222 Boilers
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