Viessmann · Boiler

F.410 BCU faulty

High severity Vitodens 200-W B2HE

What the control is telling you

Burner in a fault state; BCU internal fault.

Applies to: Vitodens 200-W B2HE 85, 120, 150, 199

Likely causes

Faulty BCU

Test and repair steps

Replace the BCU burner control unit (using ViGuide, per the manual's replacement note), then reset the appliance.

Models that show this code

4 models in Vitodens 200-W B2HE

B2HE-120B2HE-150B2HE-199B2HE-85

Other codes on the same units

F.404 BCU faulty
F.405 IO electrode ground fault
F.406 BCU faulty
F.408 BCU faulty
F.416 Flue gas temperature sensor mispositioned
F.417 BCU faulty
F.418 BCU faulty
F.425 Time synchronization failed

Save it for the next call

Star this code in the HVACopedia app and keep the whole library on your phone for jobs with no signal.

Open the app

Source: Viessmann Vitodens 200-W B2HE 85/120/150/199 Service Instructions 6167 813-24 (09/2026), Fault messages, p.62-73. Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.