Main PCB Saunier Duval Thema Condens F24E Ref. 0020018478
When you turn on the hot water tap or activate the heating, the Main PCB Saunier Duval Thema Condens F24E Ref. 0020018478 is responsible for controlling the ignition and modulation of the burner, as well as the operation of the pump and the safety features of the boiler. If it fails, you will notice that the boiler does not start, gets locked, or exhibits erratic behavior, potentially displaying fault codes such as F11, F13, or F20. This board is compatible with the Thema Condens F24 and F24E models, as well as with Themafast Condens F24, F24E, F30, and F30E, among others. It is recommended to replace it if you experience these operational issues.
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Consult via WhatsAppSaunier Duval boilers compatible with reference 0020018478
PCB with reference 0020018478. Six confirmed compatibilities: F24 and F24E.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval F24 | Thema Condens | Contrasted |
| Saunier Duval F24E | Thema Condens | Contrasted |
| Saunier Duval F24 | Themafast Condens | Contrasted |
| Saunier Duval F24E | Themafast Condens | Contrasted |
| Saunier Duval F30 | Themafast Condens | Contrasted |
| Saunier Duval F30E | Themafast Condens | 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. 0020018478 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 0020018478. 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 0020018478 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 shows no signs: screen off, no indicators, as if disconnected.
Cause: The PCB distributes the 230V power to the rest of the equipment; if it fails, no current reaches anything else.
Check the main fuse and make sure that the boiler switch is in the on position before replacing the PCB.
- 02
The remote control does not respond or display data, although the boiler works if you operate it from the panel itself.
Cause: The PCB includes the module that communicates with the remote control; if that circuit fails, the remote control becomes unresponsive even though the rest is functioning.
Check the connection and wiring of the remote control on the panel before assuming that the PCB is faulty.
- 03
The boiler stops on its own in the middle of a heating or domestic hot water cycle without any apparent reason.
Cause: An intermittent fault in the microprocessor or its capacitors can cause unexpected interruptions in the cycle.
Check if the cut coincides with the start of another appliance on the same electrical line, because a voltage drop can also cause it.
- 04
The boiler modulates poorly: it jumps from minimum to maximum power abruptly, without a smooth transition.
Cause: The PCB regulates the modulation of the flame according to the signals it receives; a fault in that management causes abrupt jumps instead of a smooth transition.
Observe if the behavior changes according to the demand (heating or domestic hot water) to determine if the fault is with the PCB or the gas valve.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F11 | Connection fault with the user interface (no signal reaching the main PCB). | The main PCB may not receive/interpret the bus from the interface; check continuity and voltages between the interface and the PCB (wiring/eBUS/5 V). If connections and UI are correct and the issue persists, the main PCB is implicated. |
| F13 | Main PCB (control board) fault/connection. | Fault in the PCB or its connections causes loss of communication/control; check connectors and harnesses. If the wiring is fine and the error persists, replace the board (ref. 0020018478). |
| F20 | Software incompatibility (interface/main PCB or incorrect product code). | Mismatch between the interface and the main PCB or incorrect product coding locks the boiler; check compatibility and the 'product code' in parameters. If the UI is correct and the fault persists, the main PCB may be the cause. |
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 PCB 0020018478
- Catalogue reference
- 0020018478
- Brand
- Saunier Duval
- Type of part
- PCBs (control boards)
- Units in stock
- 11 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- 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.
- Connectors identified on the PCB
- 24V, 230V, PW-02, X2/HY0
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval Themafast Condens F24E Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the PCB 0020018478
Is this PCB also suitable for the Themafast Condens F24ME?
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