Junkers PCB ZWE 24-3 Ref. 8748300267
If your boiler does not start, locks out, or exhibits erratic behavior, a technical diagnosis must confirm if you need the Junkers PCB ZWE 24-3 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. 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. A technician must confirm through diagnosis whether it needs to be replaced upon noticing these symptoms to restore the operation of your boiler.
- Type of part
- PCBs (control boards)
- Status
- Refurbished
- Catalogue reference
- 87483002670
- Warranty
- 1 year
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
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 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 that require diagnosis on the PCB 87483002670
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.
Do not bridge contacts or power components directly to test them. Request a technician to check the cause according to the model manual and its revision, without bypassing the protections. The symptom or fault code does not confirm on its own that this part is faulty.
- 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.
Junkers fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| 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
- Uniclima internal SKU
- PLCZWE24-3
- Brand
- Junkers
- Type of part
- PCBs (control boards)
- Units in stock
- 0 units
- 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.
- 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
