Saunier Duval Thema F23 E PCB Ref. 05741000
When you turn on the tap or activate the heating, the Saunier Duval Thema F23 E PCB controls the ignition, burner modulation, and the boiler pump. If it fails, you will notice that the boiler does not start, gets locked, or behaves erratically. This board is compatible with several models, including the Thema C 23 E, F 23 E, C AS 23 E, and F AS 23 E, as well as those from the Themaplus and Combitek ranges. It is replaced when these symptoms occur and the boiler does not operate correctly.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference 05741000
PCB with reference 05741000. Eight confirmed compatibilities: C 23 E and F 23 E.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval C 23 E | Thema | Contrasted |
| Saunier Duval F 23 E | Thema | Contrasted |
| Saunier Duval C AS 23 E | Thema | Contrasted |
| Saunier Duval F AS 23 E | Thema | Contrasted |
| Saunier Duval C 23 E | Themaplus | Contrasted |
| Saunier Duval F 23 E | Themaplus | Contrasted |
| Saunier Duval C 23 E | Combitek | Contrasted |
| Saunier Duval F 23 E | Combitek | 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. 05741000 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 05741000. 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 05741000 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 does not turn on and the panel shows no signs of life.
Cause: The PCB is not powering the control circuits, so the ignition does not start.
Check that the boiler is unplugged, that the mains fuse is not blown, and that power is reaching the input of the PCB before replacing it.
- 02
The control panel does not respond to any button presses, not even to adjust the temperature.
Cause: The microcontroller on the PCB manages communication with the display and the buttons; if it fails, the panel does not respond even though it receives power.
Disconnect and reconnect the panel connector to the PCB to rule out a contact fault before replacing it.
- 03
The boiler displays a fault code related to the PCB and does not start even after performing a reset.
Cause: The electronics detect an internal fault or a communication issue with a sensor and block ignition for safety.
Note the exact code that appears on the display and compare it with the boiler manual to confirm that it indicates a problem with the PCB and not with an external sensor.
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 05741000 PCB.
- Catalogue reference
- 05741000
- Brand
- Saunier Duval
- Type of part
- PCBs (control boards)
- Units in stock
- 1 unit
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- 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.
- Factory reference
- 05741000 (confirmed by 6 independent external sources)
- Voltage
- 200 V
- PCB code (corner)
- ST1389 CA0 4029
- Daughter board code
- 10S042/B
- Box code
- OV0F
- Date/lot code
- 9930
- Printed logo
- SAUNIER DUVAL (boiler brand; does not confirm the PCB manufacturer)
- Transformer reference
- GA033 (along with TÜV certification marking)
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval F 23 E Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the PCB 05741000
What voltage does the PCB of the Chaffoteaux Combitek F 23 E require?
Is this PCB suitable for a Chaffoteaux Thema C AS 23 E?
When should this PCB be replaced in a Saunier Duval Themaplus C 23 E?
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