Saunier Duval Combitek C23 / Thema C23 PCB (control board)
If your boiler does not start, gets blocked, or shows erratic behavior, you may need the Saunier Duval Combitek C23 / Thema C23 PCB. This part is responsible for controlling the ignition, the modulation of the burner, the pump, and the safety features of the boiler. It is installed in models such as the Combitek C 23 and the Combitek C 23 R, among others. It is advisable to replace it when you notice these symptoms to restore the normal operation of your boiler.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference 05744500
PCB with reference 05744500. Two confirmed compatibilities: Combitek C 23 and Combitek C 23 R.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Combitek C 23 | Combitek | Contrasted |
| Saunier Duval Combitek C 23 R | 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 the ref. 05744500 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 05744500. 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 05744500 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 switch properly between heating and domestic hot water, or it gets stuck in one mode.
Cause: The PCB manages the switch between heating and domestic hot water; a fault here blocks the change.
Manually force each mode (only DHW, only heating) to see if the fault is due to switching or the PCB.
- 02
The temperature adjustment does nothing, or the temperature varies without touching the control.
Cause: The adjustment potentiometer may be dirty or worn out.
Move the temperature control from one end to the other several times before changing the PCB.
- 03
The boiler is dead: it doesn't start at all, no indicators or display.
Cause: There is a fault in the power supply to the PCB.
Check the fuse and the input voltage before replacing the PCB.
- 04
Different faults appear depending on whether the DIP switches are touched, even though no one has moved them.
Cause: There may be a poor connection in the DIP switches that configure the operation of the PCB.
Check that they are properly fitted and in their original position.
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.
Saunier Duval electronic PCB data sheet 05744500
- Catalogue reference
- 05744500
- Brand
- Saunier Duval
- Type of part
- PCBs (control boards)
- Units in stock
- 5 units
- 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.
- Potentiometer
- brand KOKA
- Partial marking
- 1293 9AV... (cut off at the edge of the photo)
Frequently asked questions about the PCB 05744500
What brand is the potentiometer of this PCB from the Thema C23?
Is the same PCB compatible for the Combitek C23 and the Thema C23?
What is distinguished in the marking of this PCB from the Combitek/Thema C23?
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