Junkers Electronic Module ZWR 24 2ADE 23 Ref. 8748300034
RefurbishedJunkersPCBs (control boards)

Junkers Electronic Module ZWR 24 2ADE 23 Ref. 8748300034

60 €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 is unresponsive. Compatible with ZWR 11-2 KE 23, ZWR 11-2 AE 23, ZWR 18-2 KE 23 (ref. 8748300034). Includes a one-year warranty and delivery within 2–4 working days in the EU.

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

Key Data

Reference
8748300034
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. 8748300034) equips these models. Verified compatibility; check the reference before purchasing.

ZWR (heating + instantaneous DHW) -1/-2 KE/AE

  • ZWR 11-2 KE 23
  • ZWR 11-2 AE 23
  • ZWR 18-2 KE 23
  • ZWR 18-2 AE 23
  • ZWR 24-2 KE 23
  • ZWR 24-2 AE 23

ZSR (heating + storage tank) -1/-2 KE/AE

  • ZSR 11-2 KE 23
  • ZSR 11-2 AE 23
  • ZSR 18-2 KE 23
  • ZSR 18-2 AE 23
  • ZSR 24-2 KE 23
  • ZSR 24-2 AE 23

ZR (heating only) -1/-2 KE/AE

  • ZR 18-2 KE 23
  • ZR 18-2 AE 23
  • ZR 24-2 KE 23
  • ZR 24-2 AE 23

Mini KE/AE

  • Mini 8 KE 23
  • Mini 11 KE 23
  • Mini 8 AE 23
  • Mini 11 AE 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)
E0Internal fault in the PCB.Electronic module defect causes self-diagnosis error; after cutting power for 1–2 minutes and checking voltages/connectors, if it reappears, the PCB is replaced.
F0Internal fault (hardware) in the control board.Hardware/firmware error in the control board; confirm with reset and visual/electrical check; if it persists, replace the module according to the service manual.
b1The coder (Kodierstecker) is not recognized by the PCB.The PCB does not read the device identifier (fault in the PCB or the encoder itself); check the seating/value of the Kodierstecker and, if correct, replace the PCB.
b2Internal data error (memory/parameterization) in the electronics.Data corruption in the PCB (EEPROM/Heatronic parameterization); try service reset (Function 8) and check the fuse on the PCB; if it persists, replace the PCB.
d8Internal fault of the base module (Grundmodul).Main module/PCB fault; Heatronic diagnosis indicates replacing the base module after ruling out other causes.
How do I know if this PCB is for my boiler?
Verify the reference 8748300034 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.

Spare Parts Related Boiler ZWR 24 2ADE 23

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