Junkers PCB ZWE24-2KDG Ref. 8746300193
The Junkers ZWE24-2KDG PCB is installed in the Eurostar range boilers. This part is responsible for controlling the ignition, burner modulation, pump, and safety features of the boiler. When the PCB fails, the boiler may not start, may lock out, or may behave erratically, and the fault code E9: STB activated may appear. It is compatible with models such as ZE 24-2 KDP, ZWE 24-2 KDP, ZWE 24-2 KDG, and ZWE 24-2 KP, among others. It should be replaced when it shows faults or malfunctions.
VAT included
Consult via WhatsAppJunkers boilers compatible with reference 8748300213
PCB with reference 8748300213. Four confirmed compatibilities: ZE 24-2 KDP and ZWE 24-2 KDP.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Junkers ZE 24-2 KDP | Eurostar (ZWE 24 atmospheric, KD/KP generation) | Contrasted |
| Junkers ZWE 24-2 KDP | Eurostar (ZWE 24 atmospheric, KD/KP generation) | Contrasted |
| Junkers ZWE 24-2 KDG | Eurostar (ZWE 24 atmospheric, KD/KP generation) | Contrasted |
| Junkers ZWE 24-2 KP (24KP) | Eurostar (ZWE 24 atmospheric, KD/KP generation) | Contrasted |
Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.
How to check if the ref. 8748300213 is the part for your boiler
What determines it is not the boiler model, but the reference printed on the part you already have installed.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 8748300213. If it is not visible, do not identify the part from its shape alone.
- Check the full boiler model on its data plate and look for it in the model associations on this page.
- Compare the connections and physical body with the original part before installation.
- If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.
Symptoms and faults that the PCB 8748300213 resolves.
The PCB controls the ignition, modulation, and safety features of the boiler. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The boiler does not start and no lights are lit on the control panel.
Cause: If the PCB does not distribute the power, no auxiliary component (fan, gas valve, ignition) is activated.
Check that 230V is reaching the input of the PCB and that the network wiring is not loose or burnt before replacing it.
- 02
The fuse of the PCB blows as soon as power is supplied to the boiler.
Cause: A short circuit in any component powered by the PCB (pump, fan, gas valve) blows the protection fuse every time it is replaced.
Before installing a new fuse, disconnect the pump and fan one by one to see if either causes the short circuit, instead of assuming the PCB is broken.
- 03
The boiler loses power in the auxiliary components even though the display remains on.
Cause: The low voltage circuit that powers the valve, pump, or ignition module may fail within the PCB without turning off the main display.
Check with the multimeter if there is voltage at the auxiliary output of the PCB before replacing it.
- 04
The boiler starts up well for a few days and then stops supplying power for no apparent reason.
Cause: An intermittent fault on the PCB (solder joint, degraded component) causes irregular power cuts.
Note when it fails (cold, prolonged use) and check connections and terminals before replacing the PCB.
Fault codes from Junkers that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| E9 | STB activated | When you see "E9" on the display, it means that the STB has been activated. This can occur if the PCB is not functioning properly and cannot adequately control the components of the boiler. Check the PCB and the elements it controls. |
These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.
Data sheet for the Junkers 8748300213 PCB.
- Catalogue reference
- 8748300213
- Brand
- Junkers
- Type of part
- PCBs (control boards)
- Units in stock
- 1 unit
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- Return
- 14 days
Data read on the part and in the manufacturer's documentation
What we have not been able to verify does not appear here.
- Supply voltage
- AC 240/230V
- Auxiliary circuit voltage
- 24V
- PCB code (read from silkscreen)
- 8746300193
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Junkers ZWE 24-2 KDG manual (PDF)Document © Junkers, provided as a technical reference.
Frequently asked questions about the PCB 8748300213
Is this PCB an original Junkers for the Eurostar ZWE24-2KDG?
What voltage does the control board of the Junkers ZWE24-2KDG operate at?
Does this PCB work for the Junkers ZWE24-2KP?
How many models are compatible with the Junkers ZWE24-2KDG PCB?
What fault code is documented for this PCB?
What is the reference for the Junkers ZWE24-2KDG PCB?
Spare parts related to Junkers Eurostar (ZWE 24 atmospheric, generation KD/KP)
