Junkers Eurostar ZWE 24 2 KDP PCB Ref. 8748300213
If your boiler does not start, locks out, or behaves erratically, a technical diagnosis must confirm if you need the Junkers Eurostar ZWE 24 2 KDP PCB Ref. 8748300213. This control board manages the ignition, burner modulation, pump, and safety features of the boiler. Users may notice issues such as fault code E0, which indicates a fault in the PCB, or fault code F0, which signals an internal fault. This part is compatible with models such as the ZE 24-2 KDP and the ZWE 24-2 KDP, among others in the Eurostar range (ZWE 24 atmospheric, generation KD/KP). A technician must confirm through diagnosis if it is necessary to replace it when these faults or abnormal behaviors occur.
Junkers 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
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- 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 that require diagnosis on the PCB 8748300213
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 the display shows a fixed fault code from the beginning.
Cause: The PCB prevents startup due to an internal fault detected upon receiving power, as a safety measure.
Note the code that appears from the start and compare it with the fault code table in the manual before replacing it.
- 02
The heating works, but the hot water does not, or vice versa.
Cause: The PCB manages both circuits separately; a fault can affect only one of them.
Check that the problem is not with the three-way valve or its motor before assuming that the PCB is faulty.
- 03
The boiler turns on and off in short cycles, without stabilizing.
Cause: A faulty temperature or flame reading by the PCB can cause continuous starts and stops.
Check the status of the flow sensor and its connection to the PCB before replacing it.
- 04
There is no response when pressing the buttons on the panel or when using the room thermostat.
Cause: If the microcontroller on the PCB hangs, it does not process the keyboard or the external inputs.
Cut the power for a couple of minutes and reconnect it before concluding that the PCB is faulty.
Junkers fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| E0 | Fault in the control board/PCB (internal fault in the control electronics). | The PCB does not pass the self-diagnosis (internal hardware/power or communication fault); check mains voltage, fuses, and connectors, and measure 5/12 V voltages on the board; if it persists after reset, the board is defective. |
| F0 | Internal fault (control unit/PCB error). | Internal fault of the PCB (hardware/memory or moisture on the board) causing a lockout; check that the board is not damp or damaged, inspect connections and supply voltages; if not resolved, replace or repair the board. |
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
- Uniclima internal SKU
- PLC-JUNK39X
- Brand
- Junkers
- Type of part
- PCBs (control boards)
- Units in stock
- 7 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
- The SKU 'PLC-JUNK39X' is an internal store code, not a manufacturer reference.
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 suitable for a ZWE24-2KDG boiler?
Spare parts related to Junkers Eurostar (ZWE 24 atmospheric, generation KD/KP)
