Junkers Eurostar ZWE24-3 / ZE24-3 PCB - Code 6 748 200
When you turn on the hot water tap or activate the heating, the Junkers Eurostar ZWE24-3 / ZE24-3 PCB (control board) - Code 6 748 200 is responsible for controlling the ignition, the modulation of the burner, and the boiler pump. If this part fails, you will notice that the boiler does not start, gets locked, or behaves erratically, showing the fault code E0: internal fault in the PCB. It is compatible with models such as the ZWE 24-3 MFK and ZE 24-3 MFK, among others. It should be replaced when these faults or abnormal behaviors occur.
VAT included
Consult via WhatsAppJunkers 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 is off and does not respond when pressing anything on the panel.
Cause: The PCB controls the power supply and operation of the boiler; if it fails, the unit does not respond.
Check that there is power at the input of the PCB and inspect the condition of the fuse before purchasing it.
- 02
An error code appears on the screen that reappears after resetting several times.
Cause: The control circuit detects a fault in a sensor or component and locks the equipment for safety.
Note the exact code: some may correspond to external sensors and not to the PCB itself.
- 03
The flame ignites strongly and then flickers or goes out, without stabilizing.
Cause: A fault in the gas valve control circuit prevents the PCB from maintaining stable modulation.
First, rule out a gas pressure issue or a gas valve problem, as the symptom is similar.
- 04
The boiler control does not respond even when the buttons or the thermostat are manipulated.
Cause: The PCB may have lost the reading of the control inputs and is not executing the commands.
Check the connectors of the remote control and the thermostat before replacing the PCB.
- 05
The boiler works well some days and does not start on others, without a clear pattern.
Cause: Intermittent faults on the PCB are usually due to solder joints or components that fail depending on the temperature.
Note under what conditions it fails (cold, humidity, time on) to identify if the problem is with the PCB.
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
- 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.
- Silkscreened code on the PCB
- 6 748 200
- Central DIP chip code
- B 748 300 233
Frequently asked questions about the PCB 87483002670
For which versions of the Junkers Eurostar is this PCB compatible?
What code will be silk-screened on the PCB of the Junkers Eurostar ZE24-3, apart from the central chip?
Spare parts related to Junkers Junkers Eurostar / Cerastar ZWE 24-3
