PCB Junkers Cerastar ZWR 24 3 Ref. 8748300281
RefurbishedJunkersPCBs (control boards)

PCB Junkers Cerastar ZWR 24 3 Ref. 8748300281

105 €VAT included

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 ZR 18-3, ZR 24-3, ZSR 18-3 (ref. 8748300281). 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
8748300281
Brand
Junkers
Type of part
PCBs (control boards)
Available units
0 units in stock
Status
Refurbished
Warranty
1 year
Shipping
2–4 working days (EU)
Return
14 days

The same part (ref. 8748300281) equips these models. Verified compatibility; check the reference before purchasing.

Junkers Cerastar (ZR/ZSR/ZWR -3)

  • ZR 18-3
  • ZR 24-3
  • ZSR 18-3
  • ZSR 24-3
  • ZWR 18-3
  • ZWR 24-3
  • ZR 11-3

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)
E0Internal error in the PCBInternal fault of the main control board (PCB). Check power supply and connectors, ignition cables and bus; if it persists after a reset, confirm by replacing or repairing the board.
F0Internal fault (PCB)Internal error managed by the Heatronic electronics. Check electrical connections and ignition cables; if not resolved with reset and checks, the documented correction is to replace the control board.
D9Incorrect PCB installed in the appliance (ZWR 24-3 AE)The boiler detects a module/PCB not corresponding to the model; it causes control incompatibility. Verify the exact reference of the PCB and coding/model; confirm by comparing the printed PN and the electrical diagram.
How do I know if this PCB is for my boiler?
Verify the reference 8748300281 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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