Unidad de control Viessmann Vitopend 100 7831047

Original control unit (automation board) for Viessmann Vitopend 100-W series gas boilers, model WH1B. This board is the 'brain' of the boiler and is responsible for controlling all its operating modes. If your boiler has stopped responding to commands, displays errors, or operates incorrectly, the cause is often a malfunction of this component. Technical specifications Part numbers: 7831047, 956.124.001. Manufacturer: Viessmann (Germany). Board type: Basic controller 9609795 42696, ICB.100.002. Compatibility: Viessmann Vitopend 100-W WH1B boilers with 24 and 30 kW capacity. Weight: ~6.38 kg. Warranty: 6 months from date of sale (in most service centers). Compatibility The control unit 7831047 is suitable for Vitopend 100-W series boilers with index WH1B. Make sure your model is listed in the table. Important: For WH1D boilers (different button layout), a different board is used – part number 7831255. Model / Series Manufacturer code Note Viessmann Vitopend 100-W WH1B (24 kW) 7831047 Compatible. Viessmann Vitopend 100-W WH1B (30 kW) 7831047 Compatible. Viessmann Vitopend 100-W WH1D 7831255 Not compatible. ⚙️ Signs of malfunction and when to replace A malfunction of the control unit can manifest in various ways. Replacement is required for the following symptoms: Errors and failures: The boiler displays an error code related to electronics, or spontaneously restarts. No response: The boiler does not respond to commands from the control panel or external thermostat. Incorrect operation: Heating or DHW does not turn on/off, the fan operates unstably, no ignition spark. Visual damage: Swollen capacitors, traces of soot or burning on the board. Replacement recommendations Qualified installation: Replacing the control unit is a complex procedure requiring experience with gas equipment.