Junkers Euromaxx PCB ZWC28 1MFA 23 Ref. 87483005330
The control PCB manages the ignition, burner modulation, pump, and safety features of the boiler. If it fails, the boiler may not start, become locked, or exhibit erratic operation, displaying the fault code F0: Internal fault/PCB fault. This board is compatible with models from the Junkers Euromaxx range ZWC 24/28-1MFA and ZWC 28/32-1MFA, among others. It is recommended to replace it when these symptoms or errors are detected. The confirmed manufacturer reference is 87483005330.
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Consult via WhatsAppJunkers boilers compatible with reference 87483005330
PCB with reference 87483005330. Four confirmed compatibilities: ZWC 24-1MFA 23 and ZWC 28-1MFA 23.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Junkers ZWC 24-1MFA 23 | Junkers Euromaxx ZWC 24/28-1MFA | Contrasted |
| Junkers ZWC 28-1MFA 23 | Junkers Euromaxx ZWC 24/28-1MFA | Contrasted |
| Junkers ZWC 28-1MFA 23 | Junkers Euromaxx ZWC 28/32-1MFA | Contrasted |
| Junkers ZWC 32-1MFA 23 | Junkers Euromaxx ZWC 28/32-1MFA | 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 reference 87483005330 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 87483005330. 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 and faults that the PCB 87483005330 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 does not turn on when the main switch is activated.
Cause: A blown fuse on the PCB prevents the control system from receiving power.
Check the fuse before considering that the PCB is faulty.
- 02
It locks up with a fault code after trying to ignite.
Cause: The electronics stop the ignition upon detecting a safety anomaly.
Note the code: many refer to the pressure switch or flue sensor, not to the PCB.
- 03
The flame fluctuates irregularly without intervention.
Cause: The electronic management of the modulation may be failing on the PCB.
Check if the problem occurs only when requesting domestic hot water or also in heating.
- 04
The boiler does not save the temperature settings when turned off.
Cause: A memory fault on the PCB prevents it from retaining the configuration.
Check if this coincides with frequent power outages in your home.
- 05
A constant relay clicking sound can be heard even when the boiler is turned off.
Cause: A relay on the PCB may be stuck or faulty and activate unnecessarily.
Listen to see if the clicking is continuous or only occurs when turning on.
Fault codes from Junkers that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F0 | Internal fault/PCB fault. | Internal fault of the PCB (Heatronic/PCB) or its associated electronics; it is checked by verifying contacts/connectors and fuses on the board and modules (BUS/RAM) and, if it persists after the reset, replacing 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 87483005330 PCB.
- Catalogue reference
- 87483005330
- Brand
- Junkers
- Type of part
- PCBs (control boards)
- Units in stock
- 2 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Frequently asked questions about the PCB 87483005330
Does this PCB work for all boilers in the ZWC 24/28-1MFA series?
Which models are compatible with the Junkers Euromaxx ZWC28 1MFA 23 Ref. 87483005330 PCB?
What fault code is documented for this PCB?
Where can I find the reference for this PCB?
How many models are compatible with this PCB?
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