Common problems guide

The most common Viessmann Vitodens 222-F B2TH-19 problems

The faults most likely to send a Viessmann Vitodens 222-F B2TH-19 into lockout — with plain-English causes, what to check first, estimated repair costs and whether you need a Gas Safe engineer.

12 documented codes
6 most common
0 DIY-safe checks
6 engineer needed

The 6 most common faults

01
F.416 High Engineer

The boiler has detected that a part which checks the exhaust fumes is not sitting in the right place, so it has stopped or may stop working until a qualified engineer checks it.

Est. cost
£80-180
Parts
Flue gas temperature sensor, Flue sensor seal or gasket, Sensor retaining clip
Full guide for F.416
02
F.59 High Engineer

The boiler's exhaust fan isn't starting when it should, so it can't safely run the heating or hot water, and it needs a qualified engineer to check the wiring and fan.

Est. cost
£100-350
Parts
Fan assembly, Fan connection cable, Fan power supply cable
Full guide for F.59
03
F.457 High Engineer

Your boiler's fan has not started when it was asked to, so the boiler has stopped and is not providing heating or hot water until it is checked.

Est. cost
£150-400
Parts
Fan assembly, Fan power and control cable harness, Main PCB (control board)
Full guide for F.457
04
F.359 High Engineer

Your boiler is trying to start up but isn't igniting its gas flame, so it has shut itself down to stay safe and isn't providing heating or hot water until it's checked.

Est. cost
£150-350
Parts
Ignition electrode, Ignition module (ignition unit), Gas valve
Full guide for F.359
05
F.357 High Engineer

Your boiler has shut itself down because it isn't receiving the gas supply it needs to start safely, so it can't currently provide heating or hot water.

Est. cost
£120-300
Parts
Gas valve (gas train), Gas pressure switch, Gas filter
Full guide for F.357
06
F.369 High Engineer

The boiler started trying to light but could not detect a flame, so it has stopped as a safety measure and will likely need a qualified engineer to check the flame sensing and gas supply before it can run again.

Est. cost
£100-220
Parts
Ionisation electrode, Ignition electrode, Burner gauze assembly gasket
Full guide for F.369
Parts most often replaced

on the Viessmann Vitodens 222-F B2TH-19

Flue gas temperature sensorFlue sensor seal or gasketSensor retaining clipFan assemblyFan connection cableFan power supply cable

Based on parts cited in our fault code database. Your engineer will confirm what's actually needed after diagnosis.

Call a Gas Safe engineer if…

  • You can smell gas or see signs of a leak
  • The Viessmann shows an Emergency or High severity code
  • The boiler keeps locking out after repeated resets
  • You've tried the DIY checks and the fault hasn't cleared
  • There's visible water leaking from the boiler
  • The flame is yellow or orange instead of blue
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See the full 12-code list for the Viessmann Vitodens 222-F B2TH-19

Related guides

Boiler losing pressure → No hot water → When to replace → Symptom checker →