CodeRegistry
Brands
  1. Home
  2. Vaillant
  3. ecoTEC plus Boilers
  4. F92
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.

F92

F92 - Coding resistance mismatch for gas type

Vaillant · ecoTEC plus Boilers

What does F92 mean?

The Vaillant Ecotec Plus Boilers have detected that the coding resistance on its main circuit board (PCB) does not match the configured gas group. This is crucial for proper and safe operation with the correct gas type.

Common Causes

  • Incorrect coding resistance installed on the PCB for the current gas family.
  • Gas family check not performed or incorrect gas group entered during setup.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify that the coding resistor on the board is the correct one for your specific gas type.

  2. 2

    Ensure the gas family check procedure has been correctly repeated.

  3. 3

    Enter the correct gas group setting according to your boiler's specifications.

  4. 4

    This type of adjustment typically requires a qualified installer or service technician to address.

Browse all codes in this manual (100)
Verified technical data. Last updated: April 2026

Related Faults

F.0F.0 — Flow–NTC open circuitF.1F.1 — Return–NTC open circuitF.10F.10 — Flow NTC short circuit
Source: Vaillant ecoTEC plus Boilers
Open Manual (Page 9)Search more codes in this manual