Junkers Cerapur Comfort PCB Zwbc 30 2C Ref. 8748300923
RefurbishedJunkersPCBs (control boards)

Junkers Cerapur Comfort PCB Zwbc 30 2C Ref. 8748300923

105 €VAT includedIn stock · 1 unit

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 up, or the display does not respond. Compatible with ZWBC 24-2C, ZWBC 25-2C, ZWBC 28-2C (ref. 8748300923). 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
8748300923
Brand
Junkers
Type of part
PCBs (control boards)
Available units
1 unit in stock
Status
Refurbished
Warranty
1 year
Shipping
2–4 working days (EU)
Return
14 days

The same part (ref. 8748300923) equips these models. Verified compatibility; check the reference before purchasing.

Cerapur Comfort ZWBC (2C)

  • ZWBC 24-2C
  • ZWBC 25-2C
  • ZWBC 28-2C
  • ZWBC 30-2C

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 error.The PCB (control board) has an internal fault (e.g., A/D converter, memory, or power supply), triggering the "F0". Check voltages and wiring, encoder connections, and if the error persists after reset and testing, replace the PCB 8748300923.
How do I know if this PCB is for my boiler?
Verify the reference 8748300923 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part. It is a Junkers (Bosch) piece - OEM PCB, with no third-party component manufacturer identified.
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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