Saunier Duval Thema Condens F25/F30 PCB Ref. 0020204481
Saunier Duval Thema Condens includes the PCB Thema Condens F25/F30, which controls the ignition, burner modulation, pump, and safety features of the boiler. When this part fails, the boiler may not start, lock out, or operate erratically, showing symptoms such as fault codes F.13, F.63, or F.65. This board is compatible with several models such as Thema Condens F25 A-H-ES, Thema Condens 25-A, and Themafast Condens 30-A, among others. It is recommended to replace the board when faults in the boiler's operation are detected.
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Consult via WhatsAppSaunier Duval boilers compatible with reference 0020204481
PCB with reference 0020204481. Ten verified compatibilities: Thema Condens F25 A-H-ES and Thema Condens 25-A.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Thema Condens F25 A-H-ES | Thema Condens | Contrasted |
| Saunier Duval Thema Condens 25-A | Thema Condens | Contrasted |
| Saunier Duval Thema Condens 25-A R2 | Thema Condens | Contrasted |
| Saunier Duval Thema Condens AS 25-A | Thema Condens | Contrasted |
| Saunier Duval Themafast Condens 25-A | Themafast Condens | Contrasted |
| Saunier Duval Themafast Condens F25 | Themafast Condens | Contrasted |
| Saunier Duval Themafast Condens F30 | Themafast Condens | Contrasted |
| Saunier Duval Themafast Condens 30-A | Themafast Condens | Contrasted |
| Saunier Duval Semia Condens F25 | Semia Condens | Contrasted |
| Saunier Duval Semia Condens 25-A-H | Semia 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. 0020204481 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 0020204481. 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 0020204481 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 off, with no indicator lights or response when pressing buttons.
Cause: If the PCB doesn't start its own electronics, no control or display will respond even if the rest of the boiler is fine.
Confirm that power is reaching the boiler and that the main fuse is not blown.
- 02
A different fault code appears each time, with no clear relation to what has been done.
Cause: It is typical of a PCB that starts to fail internally: it gives erratic readings from several sensors at once.
Disconnect and reconnect the connectors on the PCB; a poor connection can mimic this behavior.
- 03
The remote control or the control panel does not respond to any commands.
Cause: The communication between the control and the boiler is managed from the PCB, and a fault there renders the control ineffective.
Check the wiring or communication bus between the control and the PCB before assuming the PCB is faulty.
- 04
The boiler starts the ignition cycle but stops just before the flame ignites.
Cause: The PCB does not reach the final command to open the gas or spark, and it cuts the sequence halfway through.
Check that the ignition electrode and the spark cable are in good condition before replacing the PCB.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F.13 | Main PCB (control board) fault of the unit. | The manual and technical sources define it as a fault of the main control board, the most likely cause of this code in Thema Condens. Check by tightening the connectors on the board and, if it persists after ruling out the sensor/relay, replace the board. Note: several sources warn that F.13 can also originate from the NTC sensor or relay, so it is advisable to rule out these components before changing the board. |
| F.63 | EEPROM memory fault of the electronics (PCB). | It is an internal fault of the PCB itself (defective EEPROM memory), which directly points to this part. Verify: if the fault code persists after a reset, the PCB is damaged and requires replacement. |
| F.70 | Invalid product code (DSN: Device Specific Number). | It typically appears after replacing the PCB (and/or the display) without readjusting the appliance code, or due to incorrect/missing power resistance coding. It is the code directly linked to the spare part of THIS piece: verify by re-entering the correct DSN of the appliance after installing the new board. |
| F.65 | Temperature of the electronics too high. | The control electronics (PCB) overheats due to external effects or an internal fault of the PCB itself. First, check ventilation/ambient temperature and dissipation; if the environment is normal, the fault is with the PCB. |
| F.64 | Fault in the electronics / NTC sensor (analog-to-digital conversion). | Short circuit in the flow or return NTC sensor, or defect in the control board. Check/measure the NTC sensors first; if they are correct, the fault is 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 PCB 0020204481
- Catalogue reference
- 0020204481
- 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
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval Thema Condens F25 A-H-ES Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the PCB 0020204481
Is this PCB suitable for the Saunier Duval Thema Condens AS 25-A?
Is this PCB also suitable for the Saunier Duval ThemaFast Condens 30-A?
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