Saunier Duval Combitek F 23 E PCB - Code ST1407 CA04003
When you open the tap or turn on the heating, the PCB Saunier Duval, 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. A technician must confirm through diagnosis whether it needs to be replaced when these symptoms occur, as its malfunction affects the operation of your boiler.
- Type of part
- PCBs (control boards)
- Status
- Refurbished
- Catalogue reference
- 05728600
- Warranty
- 1 year
Saunier 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
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- 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 that require diagnosis on the PCB 05728600
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.
Do not bridge contacts or power components directly to test them. Request a technician to check the cause according to the model manual and its revision, without bypassing the protections. The symptom or fault code does not confirm on its own that this part is faulty.
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
- Uniclima internal SKU
- CTECCF23E
- Brand
- Saunier Duval
- Type of part
- PCBs (control boards)
- Units in stock
- 1 unit
- 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.
- 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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