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F.62

F.62 — Defective Gas Valve Closure Mechanism (Turbomax Plus)

Vaillant · Turbomax Plus Boilers

What does F.62 mean?

This indicates a problem with the Turbomax Plus boiler's gas valve's ability to close properly. This could potentially lead to the boiler exceeding its maximum safe temperature, causing a shutdown.

Common Causes

  • Defective gas valve closure mechanism
  • Boiler exceeding maximum temperature due to gas valve issue

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the boiler at the mains and allow it to cool down completely.

  2. 2

    Restart the boiler after a short wait (e.g., 5-10 minutes).

  3. 3

    If the error reoccurs, contact a qualified heating engineer immediately as this relates to gas safety components.

Browse all codes in this manual (55)
Verified technical data. Last updated: April 2026

Related Faults

F.00F.00 — Flow NTC Cable Defective or Broken (Turbomax Plus)F.00, F.04, F.05, F.10, F.14, F.15F.00, F.04, F.05, F.10, F.14, F.15 — NTC Sensor Fault (Ecomax Pro 828E)F.01F.01 — Feed Temperature Sensor (NTC) Fault or Open Circuit (Turbomax Plus)
Source: Vaillant Turbomax Plus Boilers
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