Viessmann Vitodens 100 W WB1B Control PCB Ref. 7841525
RefurbishedViessmannPCBs (control boards)

Viessmann Vitodens 100 W WB1B Control PCB Ref. 7841525

145 €VAT includedIn stock · 2 units

PCB (control board): refurbished spare part that controls the ignition, modulation, and safety features of the boiler. Useful if the boiler does not ignite, locks out, or the display is unresponsive. Compatible with Vitodens 100-W WB1B 13 kW, Vitodens 100-W WB1B 16 kW, Vitodens 100-W WB1B 19 kW (ref. 7841525). Includes a one-year warranty and delivery within 2–4 working days in the EU.

1
Consult via WhatsApp
Delivery in 2–4 working days
1-year warranty
14-day return
Technical support

Key Data

Reference
7841525
Brand
Viessmann
Type of part
PCBs (control boards)
Available units
2 units in stock
Status
Refurbished
Warranty
1 year
Shipping
2–4 working days (EU)
Return
14 days

The same part (ref. 7841525) equips these models. Verified compatibility; check the reference before purchasing.

Vitodens 100-W WB1B

  • Vitodens 100-W WB1B 13 kW
  • Vitodens 100-W WB1B 16 kW
  • Vitodens 100-W WB1B 19 kW
  • Vitodens 100-W WB1B 26 kW
  • Vitodens 100-W WB1B 35 kW

Fault codes related to this part (not the entire boiler). They usually have more possible causes: first rule out electrodes, wiring/connections, and gas supply. Verified with ≥3 sources.

CodeWhat does it mean?Cause and diagnosis (this part)
F0Internal fault (replace control unit).The PCB/control board has an internal fault. Check by ruling out ionisation/sensor issues and performing a reset; if it reappears, replace the PCB/control unit.
FCDefective fan electrical control (control unit).The fan control stage on the PCB is damaged. Check the fan, power supply, and fan harness; if everything is correct, replace the control unit/PCB.
FDFault in the burner control board.Fault in the control unit electronics (PCB). Check electrodes/cables and possible EMC interferences; if it persists, replace the control unit/PCB.
FFFault in the burner control board.Fault in the control electronics; after checking ignition/cables and interferences, the manufacturer advises replacing the control unit/PCB if the fault persists.
How do I know if this PCB is for my boiler?
Verify the reference 7841525 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part.
What is it used for?
The PCB controls the ignition, modulation, sensor readings, and safety features of the boiler.
Is the boiler not igniting, locking out, or is the control board unresponsive?
After ruling out mains voltage, fuse, and connectors, a damaged PCB causes lockouts, blackouts, or erratic display. Repair the external cause before installing the new one.
Which models is it suitable for?
Part shared by various models (see Compatibility). If your model does not appear, send us a photo of the marking and we will confirm it.
Installation and recommendations
After installation, a technician must adjust the service parameters (type of gas, power settings) and check combustion and safety features.
What does refurbished mean and what coverage does it have?
Part removed from a boiler out of service, inspected and tested. Includes 1-year warranty and 14-day return policy. Delivery within 2–4 working days in the EU.
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