Junkers PCB ZWE24-2KDG Ref. 8748300214
In the Junkers ZWE24-2KDG boilers, the PCB acts as the brain of the system, controlling the ignition, burner modulation, pump, and safety features. When this part fails, the boiler may not start, become locked, or exhibit erratic operation. Users may experience faults such as E0, which indicates a failure of the PCB, or F0, which signals an internal fault. This PCB is compatible with models from the Eurostar range, such as the ZWE 24-2 KDP and other similar ones. A technician must confirm through diagnosis whether it needs to be replaced when the mentioned symptoms are present.
- Type of part
- PCBs (control boards)
- Status
- Refurbished
- Catalogue reference
- 8748300213
- Warranty
- 1 year
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
When the power-on command is given, nothing happens: neither the fan is heard nor anything appears on the display.
Cause: The PCB does not send current to the start stage, usually due to a blown fuse or an internal fault.
First, check the fuse on the PCB; it is usually visible on the edge of the board, before replacing the entire component.
- 02
The display shows a fault code, but when turning the boiler off and on again, it works for a while as if nothing happened.
Cause: It is typical for a PCB with an intermittent fault to be temporarily corrected by resetting.
Record how many times the same fault code occurs in a day; if it is recurrent with the boiler cold and running, it is not a coincidence.
- 03
You have changed the setting on the room thermostat and the boiler does not respond, as if it doesn't hear it.
Cause: The PCB does not manage the communication with the modulating regulator or thermostat properly.
Check that the wiring of the control reaches the corresponding terminals of the PCB and that there is no moisture or oxidation in the connector.
- 04
You notice a slight burnt smell or see a blackened spot on some component of the PCB, even though the boiler still starts up.
Cause: It is usually a relay or a capacitor on the PCB that has degraded and will eventually fail completely.
With the boiler unplugged, visually inspect the PCB for dark spots, odor, or swollen components before deciding on the replacement.
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
- PLCZWE24-2KDG23
- Brand
- Junkers
- Type of part
- PCBs (control boards)
- Units in stock
- 1 unit
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Part data and available documentation
Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.
- Fuse
- 0.4A
- Printed code (this unit)
- 8 748 300 214
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 the PCB of the Junkers ZWE24-2KDG original from the brand?
What fuse does the PCB of the ZWE24-2KDG use?
Does this PCB work for a ZE24-2KP boiler?
How do I know if my ZWE24-2KDP needs this same PCB or a different reference?
Spare parts related to Junkers Eurostar (ZWE 24 atmospheric, generation KD/KP)
