Saunier Duval Thema NOx F25 B 2 Display Module Ref. 0020124927
RefurbishedSaunier DuvalPCBs (control boards)

Saunier Duval Thema NOx F25 B 2 Display Module Ref. 0020124927

45 €VAT includedIn stock · 1 unit

PCB (control board): refurbished spare part that controls the ignition, modulation, and safety features of the boiler. Useful if the boiler does not ignite, locks up, or the display is unresponsive. Compatible with Thema NOx F25 B, Thema NOx F25 B 2 (ref. 0020124927). Includes a one-year warranty and delivery within 2–4 working days in the EU.

1
Consult via WhatsApp
Delivery in 2–4 working days
1-year warranty
14-day return
Technical support

Key Data

Reference
0020124927
Brand
Saunier Duval
Type of part
PCBs (control boards)
Available units
1 unit in stock
Status
Refurbished
Warranty
1 year
Shipping
2–4 working days (EU)
Return
14 days

The same part (ref. 0020124927) equips these models. Verified compatibility; check the reference before purchasing.

NOx Thema

  • Thema NOx F25 B
  • Thema NOx F25 B 2

Fault codes related to this part (not the entire boiler). They usually have more possible causes: first rule out electrodes, wiring/connections, and gas supply. Verified with ≥3 sources.

CodeWhat does it mean?Cause and diagnosis (this part)
F11No signal user interface (connection fault between panel and PCB).The display module 0020124927 is not communicating with the main PCB due to a fault in the display itself or the connection harness/flat cable; the electronics detect a lack of signal from the interface. Check for 5 V and continuity at the interface connector and, if applicable, test with a trial display.
F18User interface fault.Internal defect of the display module (panel PCB/control) preventing its identification and communication with the main PCB. Confirm power supply and connection; if they are correct, temporarily replace the display to rule out the part.
F20Software interface incompatible (incorrect interface or PCB/product code).After replacing the display, the version/coding does not match the main PCB (e.g., product code not adjusted), causing incompatibility. Verify that reference 0020124927 is valid for F25 B/B2 and readjust the product code in the technical menu if necessary.
How do I know if this PCB is for my boiler?
Verify the reference 0020124927 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part.
What is it used for?
The PCB controls the ignition, modulation, sensor readings, and safety features of the boiler.
Is the boiler not igniting, locking out, or is the control board unresponsive?
After ruling out mains voltage, fuse, and connectors, a damaged PCB causes lockouts, blackouts, or erratic display. Repair the external cause before installing the new one.
Which models is it suitable for?
Part shared by various models (see Compatibility). If your model does not appear, send us a photo of the marking and we will confirm it.
Installation and recommendations
After installation, a technician must adjust the service parameters (type of gas, power settings) and check combustion and safety features.
What does refurbished mean and what coverage does it have?
Part removed from a boiler out of service, inspected and tested. Includes 1-year warranty and 14-day return policy. Delivery within 2–4 working days in the EU.

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