BoilerFaultCodesWhat the manual says
Manufacturer manualAutomatic calibration of the combustion controller fault. Check gap between ionisation electrode and burner gauze assembly. Check allocation of gas type (parameter/coding address 82, gas train setting). Check flue system; remove flue gas recirculation if required. Press reset button R.
From this model's manual
Verified against the Viessmann/Viessmann Vitodens 200 W B2hb B2kb 5792013 installation & service manual.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Related fault codes
All 89 fault codes on the Vitodens 200-W B2KB-35
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