Junkers PCB ZWE 24-3 Ref. 8748300267
If your boiler does not start, locks out, or exhibits erratic behavior, you may need the Junkers ZWE 24-3 PCB Ref. 8748300267. This board, manufactured by NEC, is essential for controlling the ignition, burner modulation, pump, and safety features of the boiler. When it fails, it may display the fault code E0, indicating an internal fault in the printed circuit board. It is compatible with several models from the Eurostar and Cerastar ranges, such as the ZWE 24-3 MFK and the ZE 24-3 MFA, among others. It is recommended to replace it upon noticing these symptoms to restore the operation of your boiler.
Junkers boilers compatible with reference 87483002670
PCB with reference 87483002670. Ten verified compatibilities: ZWE 24-3 MFK and ZWE 24-3 MFKD.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Junkers ZWE 24-3 MFK | Junkers Eurostar / Cerastar ZWE 24-3 | Contrasted |
| Junkers ZWE 24-3 MFKD | Junkers Eurostar / Cerastar ZWE 24-3 | Contrasted |
| Junkers ZWE 24-3 MFAD | Junkers Eurostar / Cerastar ZWE 24-3 | Contrasted |
| Junkers ZWE 24-3 MFA | Junkers Eurostar / Cerastar ZWE 24-3 | Contrasted |
| Junkers ZWE 24-3 HAD | Junkers Eurostar / Cerastar ZWE 24-3 | Contrasted |
| Junkers ZWE 24-3 HKD | Junkers Eurostar / Cerastar ZWE 24-3 | Contrasted |
| Junkers ZE 24-3 MFK | Junkers Eurostar / Cerastar ZE 24-3 | Contrasted |
| Junkers ZE 24-3 MFA | Junkers Eurostar / Cerastar ZE 24-3 | Contrasted |
| Junkers ZWE 28-3 MFAD | Junkers Eurostar / Cerastar ZWE 28-3 | Contrasted |
| Junkers ZWE 28-3 HAD | Junkers Eurostar / Cerastar ZWE 28-3 | 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 ref. 87483002670 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 87483002670. If it is not visible, do not identify the part by 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 87483002670 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 shows no signs of life: no display, no fan, no pilot light.
Cause: The PCB is not receiving or distributing power to the other components, so nothing starts.
Measure with a multimeter that current is reaching the PCB and check its fuse before declaring it dead.
- 02
It turns on, works for a while, and then suddenly stops by itself displaying a fault code that is not always the same.
Cause: The contacts or solder joints on the PCB fail intermittently, especially with the heat from operation.
Note the exact code each time it jumps: if it changes from one fault to another without reason, point to the PCB and not to a specific component.
- 03
The thermostat or the boiler control is unable to start, even though it requests heating.
Cause: The stage of the PCB that receives the signal from the thermostat is not processing the command.
Manually bridge the demand at the terminals of the PCB, according to the manufacturer's diagram, to rule out that the fault is in the thermostat or the wiring.
- 04
The pump or the fan stays on all the time, even when the boiler is not calling for heat.
Cause: The relay on the PCB that controls that component has stuck and does not cut off.
Disconnect the connector of that component on the PCB; if there is still output current, the relay is soldered and the problem is not with the component.
Fault codes from Junkers that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| E0 | Internal fault in the PCB. | The self-diagnosis detects an internal fault in the main board; the manufacturer prescribes replacing the printed circuit board. Beforehand, check power supplies/connections and fuses and reset: if the E0 reappears, the PCB is defective. |
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 87483002670 PCB.
- Catalogue reference
- 87483002670
- Brand
- Junkers
- Type of part
- PCBs (control boards)
- Units in stock
- 0 units
- 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.
- PCB code (silkscreen)
- 8748300267
- Additional code on PCB
- 8737702723
- KW code
- G 41/21
- Reference printed on the back
- 8737710305
- Display reference
- BS11
- EPROM chip code
- 8744501145
- EPROM chip manufacturer
- NEC
- Another printed relay
- Z 10003
- Model of the orange relay
- GZT 3 AB AA AA (possible R201-1A3-D024)
Frequently asked questions about the PCB 87483002670
Does this PCB work for a Junkers Cerastar ZWE 24-3 HA boiler?
Does this PCB work for the Cerastar ZE 24-3 MFK in addition to the ZWE?
Spare parts related to Junkers Junkers Eurostar / Cerastar ZWE 24-3
