Saunier Duval Thema NOx/Themafast NOx V-Group PCB Ref. 0020184123
Control PCB for Saunier Duval and Hermann boilers from the Nox range, with a shared design with the PM-02 board used in Thema/Micraplus Nox. The silkscreen shows the manufacturer V-Group, the manufacturing code 0020183525 (equivalent to the commercial reference 0020184123) and the batch 4131 0511 G. Power supply 230V, output 24V.
Saunier Duval boilers compatible with reference 0020184123
PCB with reference 0020184123. Six confirmed compatibilities: F 25 B and F 25 B/2.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval F 25 B | NOX Thema | Contrasted |
| Saunier Duval F 25 B/2 | NOX Thema | Contrasted |
| Saunier Duval F 25 B GN/BP | NOX Thema | Contrasted |
| Saunier Duval F 25 A LPG/GN | Themafast NOX | Contrasted |
| Saunier Duval F 30 NL/LL | Themafast NOX | Contrasted |
| Saunier Duval 24 B2 | Micraplus NOX | 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
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 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 that require diagnosis on the PCB 0020184123
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 ignite and does not respond when requesting heating or domestic hot water.
Cause: The PCB does not complete the startup sequence.
Check that 230V is reaching the PCB before replacing it.
- 02
The controls and sensors stop working, as if the control power has been lost.
Cause: The PCB does not deliver the 24V necessary for the sensors and the control panel.
Measure if there is voltage at the 24V output of the PCB before replacing it.
- 03
The boiler locks out without any noticeable external cause (gas, pressure, flame).
Cause: A fault in the electronics of the PCB causes lockouts without other components being involved.
Check the pressure switch, the sensor, and the flame detector separately: if all are functioning, the fault is with the PCB.
Fault codes Saunier Duval that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| 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 Saunier Duval PCB 0020184123
- Catalogue reference
- 0020184123
- Uniclima internal SKU
- PLSA114
- Brand
- Saunier Duval
- 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
Part data and available documentation
Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.
- Supply voltage
- 230V
- Low voltage output
- 24V
- Manufacturing code (label)
- 0020183525
- Batch / manufacturing date
- 4131 0511 G
- Manufacturer of the PCB (screen printed)
- V-Group
- PCB model (silkscreened)
- PM-02
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval F 25 B/2 Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the PCB 0020184123
Which manufacturer produces this V-Group PCB from the Saunier Duval Themafast Nox F30?
Is this V-Group PCB compatible with the Hermann Micraplus Nox 24?
What voltages does the PCB Ref. 0020184123 handle?
Is this PCB the same as the PM-02 used in the Thema Nox F25?
What batch is printed on this plate of the Themafast Nox F30?
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