Saunier Duval Combitek F 23 E PCB - Code ST1407 CA04003
When you open the tap or turn on the heating, the Saunier Duval PCB, reference ST1407 CA04003, is responsible for controlling the ignition, the modulation of the burner, the pump, and the safety features of the boiler. If it fails, you will notice that the boiler does not start, gets locked, or operates erratically. This board is compatible with the Combitek F23E and Combitek C23E models, among others. It is recommended to replace it when these symptoms occur, as its malfunction affects the operation of your boiler.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference 05728600
PCB with reference 05728600. Two confirmed compatibilities: Combitek F23E and Combitek C23E.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Combitek F23E | Combitek | Contrasted |
| Saunier Duval Combitek C23E | 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. 05728600 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 05728600. 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 05728600 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 is completely dead, no indicators or display, even though there is power at the outlet.
Cause: A burned component on the PCB can cut off all power even if mains voltage is present.
Measure the fuse on the PCB with a multimeter before declaring the board as faulty.
- 02
The fault indicator light remains on and does not turn off even if the boiler is reset.
Cause: The PCB detects a fault condition and keeps it locked until it is resolved or replaced.
Note the fault code if there is one and check the sensors, pressure switch, and gas valve, as these are the most common causes of blockage.
- 03
The boiler occasionally restarts on its own, as if it turns off and then back on.
Cause: An intermittent fault in the PCB causes micro-outages that the user perceives as resets.
Check that the SW1 switch and the PCB terminals are properly seated; a loose connection has the same effect.
- 04
The room thermostat is not able to start the boiler, even though it is requesting heat.
Cause: If the input stage of the PCB fails, it does not translate the thermostat demand into a power-on command.
Measure with a direct bridge at the terminals of the thermostat if the boiler starts; if it doesn't start, it is more likely that the PCB is failing.
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 05728600 PCB.
- Catalogue reference
- 05728600
- 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 code of the PCB
- ST1407 CA04003
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval Combitek F23E Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the PCB 05728600
Does this PCB have the code ST1407 CA04003 printed on the Combitek F 23 E?
What models are compatible with the Saunier Duval Combitek F 23 E PCB?
What terminal block does the PCB of the Combitek F 23 E have for identification?
What is the reference for this PCB?
Are there documented fault codes for this PCB?
How many models are confirmed to be compatible with this PCB?
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