Junkers Euroline ZW23 1KE31 PCB Bosch Ref. 87083002120
RefurbishedBosch JunkersPCBs (control boards)

Junkers Euroline ZW23 1KE31 PCB Bosch Ref. 87083002120

75 €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 ZW23-1AE23, ZW23-1AE31, ZW23-1KE23 (ref. 87083002120). Includes a one-year warranty and delivery within 2–4 working days in the EU.

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

Key Data

Reference
87083002120
Brand
Bosch 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. 87083002120) equips these models. Verified compatibility; check the reference before purchasing.

Junkers Euroline ZW (combi)

  • ZW23-1AE23
  • ZW23-1AE31
  • ZW23-1KE23
  • ZW23-1KE31
  • ZW24-1ELH AE23
  • ZW24-1ELH AE31
  • ZW28-1LHKE23
  • ZW28-1LHKE31
  • ZW30-1LHAE23
  • ZW30-1LHAE31

Junkers Euroline ZS (heating only)

  • ZS23-1AE23
  • ZS23-1AE31
  • ZS23-1KE23
  • ZS23-1KE31

Junkers Euroline NW24

  • NW24-1LHAE23
  • NW24-1LHAE31
  • NW24-1LHKE23
  • NW24-1LHKE31
  • NW24/28-1LHKE23
  • NW24/28-1LHKE31
  • NW24/30-1LHAE23
  • NW24/30-1LHAE31

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)
Reset button flashing 0.5 Hz + LED 75 °CDuring ignition: ionisation signal is detected but the burner does not ignite.The printed circuit board (PCB 87083002120) may fail in the detection/ionisation path or be damp, causing false flame or lack of spark; check ionisation microamperage, wiring, and moisture/oxidation on the PCB before replacing it.
Reset button flashes at 4 Hz (four times per second)Control/safety fault (encoder/sensors) including possible PCB defect.Fault in the PCB (Eurotronic/PCB) in managing inputs/power supplies; check voltages at ST2 (L–N/LR–N), fuses F1/F2, and 5 V to sensors. If everything is correct and the symptom persists, replace the 87083002120.
How do I know if this PCB is for my boiler?
Verify the reference 87083002120 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part. It is a Honeywell piece.
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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