Junkers PCB ZWA24 1KM 23 Eurosmart Ref. 8748300561
RefurbishedJunkersPCBs (control boards)

Junkers PCB ZWA24 1KM 23 Eurosmart Ref. 8748300561

95 €VAT includedIn stock · 15 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 out, or the display is unresponsive. Compatible with ZWA 24-1 AM 23, ZWA 24-1 KM 23, ZWA 24-1 AM 31 (ref. 8748300561). 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
8748300561
Brand
Junkers
Type of part
PCBs (control boards)
Available units
15 units in stock
Status
Refurbished
Warranty
1 year
Shipping
2–4 working days (EU)
Return
14 days

The same part (ref. 8748300561) equips these models. Verified compatibility; check the reference before purchasing.

Junkers Eurosmart ZWA 24-1

  • ZWA 24-1 AM 23
  • ZWA 24-1 KM 23
  • ZWA 24-1 AM 31
  • ZWA 24-1 KM 31
  • ZWA 24-1 A 23

Junkers Eurosmart ZWA 28-1

  • ZWA 28-1 AM 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)
The reset button flashes at 1 Hz (once per second)Fault indicator: lockout due to ignition failure/overheating/internal fault.A defective PCB can cause this condition by failing in flame control, power supply, or signal management; check by following Test D in the manual (voltages at ST20/ST2, wiring/ionisation control) and, if all peripherals are correct, replace the PCB.
The reset button flashes at 4 Hz (four times per second)Safety/evacuation lockout (pressure switch/NTC/fan/encoder connector).If the PCB does not power/read the pressure switch, NTC, or the encoder connector correctly, the unit enters 4 Hz; check according to Test E (encoder connector, NTC/pressure switch inputs, continuity and 5 V) and, if the sensors/wiring are ruled out, replace the PCB.
How do I know if this PCB is for my boiler?
Verify the reference 8748300561 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 ZWA24 1KM 23 Eurosmart

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