Main PCB Saunier Duval Thema NOx F25 B Ref. 0020184123
Refurbished Saunier Duval PCBs (control boards)

Main PCB Saunier Duval Thema NOx F25 B Ref. 0020184123

The main PCB Saunier Duval Thema NOx F25 B, reference 0020184123, is the component that controls the ignition, the modulation of the burner, the pump, and the safety features of the boiler. If it fails, the boiler may not start, become locked, or exhibit erratic behavior, and the fault code F63: Main printed circuit failure may appear. This component is compatible with several models from the Thema NOx range, such as the F 25 B, F 25 B/2, and F 25 B GN/BP, among others. A technician must confirm through diagnosis whether it needs to be replaced when these symptoms occur or when the PCB shows obvious signs of damage.

Type of part
PCBs (control boards)
Status
Refurbished
Catalogue reference
0020184123
Warranty
1 year
VAT included Stock · 2 units
Compatibility

Saunier Duval boilers compatible with reference 0020184123

PCB with reference 0020184123. Six confirmed compatibilities: F 25 B and F 25 B/2.

Verified compatibility

Boiler modelFamilyVerification
Saunier Duval F 25 BNOX ThemaVerified
Saunier Duval F 25 B/2NOX ThemaVerified
Saunier Duval F 25 B GN/BPNOX ThemaVerified
Saunier Duval F 25 A LPG/GNThemafast NOXVerified
Saunier Duval F 30 NL/LLThemafast NOXVerified
Saunier Duval 24 B2Micraplus NOXVerified

Can't see your model or have questions? The printed reference takes precedence. How to check it ·

Guide

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.

  1. 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.
  2. Check the full boiler model on its data plate and look for it in the model associations on this page.
  3. Compare the connections and physical body with the original part before installation.
  4. If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.
Diagnosis and fault codes

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 turns on, runs for a while, and then shuts off on its own without any apparent reason.

    Cause: A fault in the PCB can interrupt the supply to the gas valve or the fan while it is operating.

    Note when it turns off (start-up, domestic hot water, heating) and check it before replacing the PCB.

  • 02

    The panel does not respond to any button presses, neither for temperature adjustment nor for reset.

    Cause: The circuit that manages the keyboard on the PCB is not reading the commands.

    Disconnect the power for thirty seconds and try again before assuming that the PCB is broken.

  • 03

    The boiler operates normally but occasionally resets itself and returns to the initial screen.

    Cause: There may be a fault in the internal power supply that resets the microprocessor on the PCB.

    Check for any micro-cuts in the home's electrical network before replacing the PCB.

  • 04

    A flame fault code appears even though the burner ignites properly to the eye.

    Cause: The PCB may be misinterpreting the ionization signal even though the flame is correct.

    Clean the flame detection electrode and check its cable before replacing the PCB.

Fault codes Saunier Duval that require diagnosis

CodeFaultTechnical checks
F63Main PCB faultThe 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.

Technical data

Data sheet for the Saunier Duval PCB 0020184123

Catalogue reference
0020184123
Uniclima internal SKU
PLSA107
Brand
Saunier Duval
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

Part data and available documentation

Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.

Component code
0020184123
Documentation

Manuals and technical documentation

Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.

Frequently asked questions

Frequently asked questions about the PCB 0020184123

What is the reference for the main PCB of the Saunier Duval Thema NOx F25 B?
The reference is 0020184123, confirmed by two independent external sources.
For which models is the main PCB PLSA107 compatible?
It is compatible with the following models: Thema NOx F 25 B, F 25 B/2, F 25 B GN/BP; Themafast NOX F 25 A LPG/GN, F 30 NL/LL; and Micraplus NOX 24 B2.
What fault codes are documented for this PCB?
The documented fault code for this PCB is F63.
Does this PCB work for the Saunier Duval Themafast NOx F25 A boiler?
Yes, the main PCB is compatible with the Themafast NOx F25 A boiler.
How many models are compatible with the main PCB Saunier Duval?
A total of 6 models are compatible with this PCB.
What should I do if my boiler shows fault code F63?
If your boiler shows fault code F63, it may be necessary to check the main PCB, as this is a documented code for this product.

Spare parts related to Saunier Duval Thema NOX

Delivery calculated by destination Delivery time shown at checkout
1-year warranty inspected and tested
14-day return uninstalled parts
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Main PCB Saunier Duval Thema NOx F25 B Ref. 0020184123