Main PCB Saunier Duval Auxiliary Combined Thema Ref. S1047000
Main PCB for Saunier Duval boiler (Vaillant Group), SYMSI7.0 assembly. The label on the part itself indicates reference S1047000, different from the one previously listed in the file (05741000): that reference corresponds to another product in the store. The silkscreen code on the board is 0310144400S20. Power supply at 230V. The microcontroller is an M38039FFLKP.
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 start in any mode, neither heating nor domestic hot water.
Cause: The PCB is the main control unit; if it doesn't work, no circuit can be activated.
Check that the 230V power supply is reaching the PCB correctly before replacing it.
- 02
The room thermostat has no effect on the boiler.
Cause: The PCB processes the signal from the thermostat; if it fails, the command is not executed.
Check the connection and the condition of the thermostat terminals on the PCB before replacing the part.
- 03
The boiler is locking with a fault code and does not reset even when pressing the reset button.
Cause: An internal fault in the logic of the PCB may prevent the reset from functioning, even if the other components are fine.
Disconnect the boiler from the electrical network for a couple of minutes and reconnect it to check if the reset responds to a simple power cut.
- 04
The boiler relays make a switching noise but the flame does not ignite.
Cause: The PCB activates the ignition relays and gas valve; if the contact does not close properly, you can hear the attempt but there is no ignition.
Check the ignition electrode and its wiring first to rule out that the problem is there and not in the PCB.
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.
- reference
- S1047000
- screen printing code
- 0310144400S20
- supply voltage
- 230V
- microcontroller
- M38039FFLKP 0202Z003 (last digits of the second line in question)
- additional label codes (batch/barcode)
- 902038 / 443953 / 819755T0 / KWD / IND 06 / S0097
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
Why did the specification sheet for this Saunier Duval Thema PCB change the reference from 05741000 to S1047000?
Is this main PCB S1047000 manufactured by Saunier Duval or is it a third party?
What voltage does the S1047000 PCB for Thema and Combitek boilers operate at?
What microcontroller does this PCB from the Thema C 23 E have?
Is this PCB S1047000 suitable for the Themaplus F 23 E?
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