0C
FAULT CODE
Viessmann
Flame After Shutdown (Vitodens 200)
High Severity
Engineer Required
On Vitodens 200-W boilers, code 0C indicates a flame signal was still present after the burner was commanded to shut down. Safety-critical fault.
Step-by-Step Fix Guide
-
Step 1
Turn off the gas isolation valve immediately
-
Step 2
Turn off the boiler at the mains
-
Step 3 Engineer only
Call a Gas Safe registered engineer immediately
Gas Safe Reminder
Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.