Junkers Control PCB ZWA24 1A23 Ref. 87483004170
RefurbishedJunkersPCBs (control boards)

Junkers Control PCB ZWA24 1A23 Ref. 87483004170

80 €VAT includedIn stock · 8 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 does not respond. Compatible with ZWA 24-1 AM 23 (1A23) S2800/3500, ZWA 24-1 AM 31 (1A31) S2800, ZWA 24-1 KM 23 (1K23) S2892 (ref. 87483004170). 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
87483004170
Brand
Junkers
Type of part
PCBs (control boards)
Available units
8 units in stock
Status
Refurbished
Warranty
1 year
Shipping
2–4 working days (EU)
Return
14 days

The same part (ref. 87483004170) equips these models. Verified compatibility; check the reference before purchasing.

Eurosmart ZWA 24

  • ZWA 24-1 AM 23 (1A23) S2800/3500
  • ZWA 24-1 AM 31 (1A31) S2800
  • ZWA 24-1 KM 23 (1K23) S2892
  • ZWA 24-1 KM 31 (1K31) S2892

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)
The reset button flashes at 1 Hz (once per second)General fault: ignition failure/overheating or another anomaly recorded by the equipment.The control PCB can prevent ignition or flame supervision (damage to the PCB or moisture on the board). Check by measuring outputs to ignition/ionisation and gas body at the connectors indicated by the manual (Test D) and inspecting the board for moisture or damage.
The reset button flashes at 4 Hz (four times per second)Anomaly in evacuation/admission or associated elements (pressure switch, fan, NTC, encoder connector).A fault in the control board can cause incorrect readings/management of the pressure switch/fan or the encoder connector and generate this lockout. Check with Test E from the manual (voltages and continuity to sensors/actuators) and, if there is no correct response, replace the PCB.
How do I know if this PCB is for my boiler?
Verify the reference 87483004170 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 (proprietary electronics, "Junkers Neckar").
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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