PCB Junkers Bosch Euromaxx ZWC28 1MF2A Ref. 87172076530 3
The Junkers Bosch Euromaxx ZWC28 1MF2A PCB (control board) is the component responsible for controlling the ignition, burner modulation, pump, and safety features of the boiler. When it fails, the boiler may not start, become locked, or exhibit erratic behavior, which can cause inconvenience at home. This board is compatible with the Euromaxx ZWC 28-1MF2A models from Junkers and Bosch, among others. It is recommended to replace it at any sign of malfunction or error in the printed circuit, such as fault code F0.
VAT included
Consult via WhatsAppBosch Junkers boilers compatible with reference 87172076530 3
PCB with reference 87172076530 3. Two confirmed compatibilities: Euromaxx ZWC 28-1MF2A and Euromaxx ZWC 28-1MF2A.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Bosch Junkers Euromaxx ZWC 28-1MF2A | Junkers | Contrasted |
| Bosch Junkers Euromaxx ZWC 28-1MF2A | Bosch | 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. 87172076530 3 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 87172076530 3. 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 87172076530 3 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 completely dead, not even a pilot light is on.
Cause: Without the PCB, there is no ignition management or power supply for the rest of the electronics.
Before purchasing, measure if there is voltage at the boiler's input and check the main fuse.
- 02
When installing a new PCB, the fuse blows immediately.
Cause: This usually indicates a short circuit in another component (pump, transformer) that damages the newly installed PCB, not a factory defect of the PCB.
Before replacing the PCB, measure the resistance of the pump and the transformer to rule out a downstream short circuit.
- 03
The wall programmer is not syncing with the boiler.
Cause: The PCB is the one that communicates with the remote control; if the communication module fails, synchronization is not possible.
Check the physical connection of the control cable and, if it is wireless, the status of the transmitter's batteries.
- 04
The relays can be heard clicking, but the pump or the gas valve are not receiving power.
Cause: A worn relay on the PCB can close the contact without allowing enough current to pass to the component.
Measure with a multimeter if there is output voltage at the pump connector at the moment of the click.
Fault codes for Bosch Junkers that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F0 | Internal fault/PCB fault. | Internal fault of the PCB (Heatronic control detects a defect in the printed circuit or its data). Check connections and fuses of the board, power supply voltages, and BUS; if it persists after checking wiring and contacts, replace 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 Bosch Junkers PCB 87172076530 3
- Catalogue reference
- 87172076530 3
- Brand
- Bosch 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
Data read on the part and in the manufacturer's documentation
What we have not been able to verify does not appear here.
- Visible PCB code (partial, covered by a relay)
- 8 718 30_ (group of digits following uncertain, between 717 and 718; rest out of frame)
- The code on the PCB is partially covered by a relay: only '8 718 30_' can be read.
Frequently asked questions about the PCB 87172076530 3
Is this PCB compatible with the Junkers Euromaxx ZWC28-1MF2A?
What should I do if the code on my PCB does not exactly match 87172076530?
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