PCB Junkers Bosch Eurostar ACU HIT Zwse 28 4 MFA Ref. 8748300506
RefurbishedJunkersPCBs (control boards)

PCB Junkers Bosch Eurostar ACU HIT Zwse 28 4 MFA Ref. 8748300506

115 €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 up, or the display is unresponsive. Compatible with ZWC 24-1MFA 23, ZWC 28-1MFA 23 (ref. 8748300506). 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
8748300506
Brand
Junkers
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. 8748300506) equips these models. Verified compatibility; check the reference before purchasing.

Junkers Euromaxx

  • ZWC 24-1MFA 23
  • ZWC 28-1MFA 23

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/PCB fault.The Heatronic PCB itself has an internal fault (hardware/relays/tracks) or in its communication circuits. Check voltages and connectors (bus module, RAM/ignition); if it persists, replace the PCB.
How do I know if this PCB is for my boiler?
Verify the reference 8748300506 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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