Main PCB Hermann Micraplus NOx 24 B 2 Ref. 0020184123
The Main PCB Hermann Micraplus NOX 24 B 2 Ref. 0020184123 controls the ignition, burner modulation, pump, and safety features of the boiler. When it fails, the boiler may not start, lock out, or behave erratically, displaying the fault code F63: Main printed circuit board fault. This board is compatible with Hermann models such as the Micraplus NOx 24-B/2 and Saunier Duval models like the Micraplus NOx 24, Micraplus NOx 25, and others from the Thema range. It should be replaced when the mentioned symptoms occur or if a fault in the printed circuit board is indicated.
VAT included
Consult via WhatsAppHermann boilers compatible with reference 0020184123
PCB with reference 0020184123. Nine confirmed compatibilities: Micraplus NOx 24-B/2 and Duval Micraplus NOx 24.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Hermann Micraplus NOx 24-B/2 | Hermann | Contrasted |
| Hermann Duval Micraplus NOx 24 | Saunier | Contrasted |
| Hermann Duval Micraplus NOx 25 | Saunier | Contrasted |
| Hermann Duval Thema NOx F25 | Saunier | Contrasted |
| Hermann Duval Thema NOx F25 B/2 | Saunier | Contrasted |
| Hermann Duval Thema NOx F25-B | Saunier | Contrasted |
| Hermann Duval Thema NOx F30 | Saunier | Contrasted |
| Hermann Duval Themafast NOx F25-A | Saunier | Contrasted |
| Hermann Duval Themafast NOx F30 | Saunier | 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. 0020184123 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 0020184123. 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 0020184123 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 unresponsive, neither the clock nor the indicators light up.
Cause: The PCB has stopped receiving power and cannot be repaired.
Check the fuse on the PCB and the input voltage before replacing it.
- 02
The display shows an error and the boiler locks out for no apparent reason.
Cause: The electronics receive an incorrect signal from a sensor, such as the NTC sensor or the pressure switch, and stops the cycle.
Note the fault code and check the connector of the affected sensor before requesting the new PCB.
- 03
The remote control or the programmer cannot turn on the boiler even though they request heating.
Cause: The PCB is not receiving or interpreting the demand system signal.
Check that connectors X2 and X41 are properly connected and free of oxidation before replacing the PCB.
- 04
The boiler operates intermittently and shuts down by itself repeatedly.
Cause: An internal fault in the electronics, which cannot be repaired, causes interruptions in operation.
Check if the fault disappears when you reset the boiler; if it returns quickly, it is more likely to be the PCB and not a loose sensor.
Fault codes Hermann that this part solves
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F63 | Main PCB fault | The EEPROM/electronics of the main board is damaged or corrupted, causing the equipment to lock. Check the board voltages, connections, and if the issue persists, replace/reprogram the PCB 0020184123. |
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 PCB Hermann 0020184123
- Catalogue reference
- 0020184123
- Brand
- Hermann
- 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.
- Connector silk-screening
- X2/HYd, V-Group, PM-02, X102 P2, X41 Text/PTank
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Hermann Duval Thema NOx F25 B/2 manual (PDF)Document © Hermann, provided as a technical reference.
Frequently asked questions about the PCB 0020184123
Is this PCB with reference 0020184123 the one used in the Hermann Micraplus NOx 24-B/2?
Is this PCB suitable for a Saunier Duval Thema NOx F30?
When should this PCB for the Micraplus NOx 24-B/2 be replaced?
Spare parts related to Hermann Saunier
