CodeRegistry
Brands
  1. Home
  2. Viessmann
  3. Vitodens 200/222 Boilers
  4. 2
About·Privacy·Terms

CodeRegistry — Your global library for technical solutions.

For your safety: always follow the equipment manufacturer’s official manuals. CodeRegistry is an independent help site and is not affiliated with the brands listed here.

2

Fault 2 — No or low gas pressure detected

Viessmann · Vitodens 200/222 Boilers

What does 2 mean?

The boiler has detected a problem with the gas supply, specifically no or low gas pressure. This prevents the burner from igniting safely.

Common Causes

  • Gas supply - no/low gas pressure detected

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check your main gas supply and ensure other gas appliances in your home are working.

  2. 2

    Verify that the gas isolation valve for the boiler is fully open.

  3. 3

    Press the reset button R on the boiler.

  4. 4

    If the issue persists, contact a qualified gas safe engineer to inspect the gas supply.

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

Related Faults

29Fault 29 — Open circuit at power pump module terminals 1 and L3Fault 3 — No boiler water circulation detected30Fault 30 (Detailed 140) — Burner blocked due to boiler water sensor short circuit
Source: Viessmann Vitodens 200/222 Boilers
Open Manual (Page 3)Search more codes in this manual