Viessmann B2TB004 - User Manual

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5461 889 - 16 01/2019

Installation Instructions

Vitodens 222-F, B2TB

Models 19, 35, 68, 125

Floor mounted, gas-fired condensing storage combi boiler

For operation with natural gas and liquid propane gas

Heating input: 12 to 125 MBH

3.5 to 37 kW

VITODENS

222-F

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Questions and Answers

R
richardsmichaelSep 18, 2025
Why is my Viessmann Boiler showing error code A8?
- S
  Samantha FreemanSep 18, 2025
  If your Viessmann Boiler is showing error code A8, it indicates an air lock in the internal circulation pump or that the minimum flow rate is not achieved. If the fault message continues to be displayed, vent the system.
C
Cristina PerrySep 18, 2025
What does error code b1 mean on a Viessmann B2TB004 Boiler?
- S
  Sara BernardSep 18, 2025
  If your Viessmann Boiler displays error code b1, it means there is a communication error with the programming unit. Check the connections and replace the programming unit, if required.
C
Cassandra BellSep 18, 2025
What does error code A9 mean on my Viessmann B2TB004?
- L
  Lisa CarrilloSep 22, 2025
  If your Viessmann Boiler displays error code A9, it indicates that the internal circulation pump is blocked. To resolve this, check the circulation pump.
E
Erica CummingsSep 22, 2025
What should I do if my Viessmann B2TB004 Boiler shows error code b7?
- O
  Olivia SimpsonSep 22, 2025
  If your Viessmann Boiler shows error code b7, it indicates a boiler coding card fault. To fix this, plug in the boiler coding card or replace it if it is faulty.
K
Kristen BruceSep 22, 2025
What to do if my Viessmann Boiler displays error code bA?
- J
  Jay RussellSep 22, 2025
  If your Viessmann Boiler displays error code bA, it indicates a communication error with the extension kit for heating circuit 2 (with mixer). To resolve this, check the extension kit connections and code.
R
rburtonSep 22, 2025
What does error code Ed mean on a Viessmann B2TB004?
- K
  Kayla BarnettSep 22, 2025
  If your Viessmann Boiler displays error code Ed, it indicates an internal fault. To resolve this, replace the control unit.
N
Nicole RamirezSep 22, 2025
What does error code F0 mean on a Viessmann Boiler?
- J
  Jeremy HillSep 22, 2025
  If your Viessmann Boiler displays error code F0, it indicates an internal fault. To resolve this, replace the control unit.
P
Patricia MichaelSep 22, 2025
What does error code b4 mean on my Viessmann Boiler?
- C
  Carol KramerSep 23, 2025
  If your Viessmann Boiler displays error code b4, it indicates an internal fault. To fix this, replace the control unit.
W
wortizSep 23, 2025
What does error code b5 mean on my Viessmann Boiler?
- M
  Michael EvansSep 23, 2025
  If your Viessmann Boiler displays error code b5, it indicates an internal fault. To fix this, replace the control unit.
N
Nicole MitchellSep 23, 2025
What causes error code C4 on a Viessmann B2TB004 Boiler?
- M
  Mary TurnerSep 23, 2025
  If your Viessmann Boiler displays error code C4, it indicates a communication error with the Open Therm extension. To resolve this, check the Open Therm extension.