Saunier Duval Semiatek F24 E PCB Ref. 0020039204
Control PCB for Saunier Duval boilers from the Semia and Semiatek ranges, SYMSI 7.0 platform, revision 1.6. The silkscreen code on the circuit, 0020019951-1.6, corresponds to the commercial reference 0020039204. There is no visible manufacturer logo on the board; the Saunier Duval brand (Vaillant Group) is confirmed by the official data sheet from a distributor.
Saunier Duval boilers compatible with reference 0020039204
PCB with reference 0020039204. Seven confirmed compatibilities: SemiaTek F 24 and SemiaTek F 24 E.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval SemiaTek F 24 | SemiaTek F | Contrasted |
| Saunier Duval SemiaTek F 24 E | SemiaTek F | Contrasted |
| Saunier Duval SemiaTek F 24-ME | SemiaTek F | Contrasted |
| Saunier Duval SemiaTek C 24 | SemiaTek C | Contrasted |
| Saunier Duval SemiaTek C 24 E | SemiaTek C | Contrasted |
| Saunier Duval Semia F 24 | Semia | Contrasted |
| Saunier Duval Semia C 24 | Semia | 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 reference 0020039204 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 0020039204. 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 0020039204 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 ignite, there are no indicators or screens lit up.
Cause: The PCB controls all the electronics of the boiler; if its input stage fails, no power reaches any component.
Check the fuse on the PCB and verify that 230V is reaching the input terminal before declaring the board faulty.
- 02
The control shows a fault code that reappears immediately after resetting.
Cause: The SYMSI 7.0 platform manages safety logic and translates each detected fault into its own code.
Note the exact code and check it in the fault table of the model: some point to sensor or pressure, not to the PCB.
- 03
The boiler ignites, heats for a moment, and then turns off by itself for no apparent reason.
Cause: A fault in the flame control stage of the PCB can interpret a false signal and shut off the burner for safety.
Check that the ionization electrode and its wiring are not dirty or corroded before replacing the PCB.
- 04
The boiler control is unresponsive or frozen.
Cause: The control module communicates with this PCB via a bus; if the PCB does not respond, the control seems dead even if it is functioning properly.
Disconnect and reconnect the communication bus connector, and check that it is not oxidized before replacing the PCB.
- 05
The pump or the gas valve does not start even though the boiler seems to have power.
Cause: The output relays on the PCB are the ones that activate these components; if one fails, the rest can continue to operate normally.
Measure with a multimeter if current is reaching the connector of the pump or the gas valve when the boiler requests heat.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F.63 | Fault: EEPROM | The EEPROM memory of the PCB is damaged or unreadable. Check the power supply voltages of the PCB and attempt a reset; if F.63 persists after ruling out power supply and parameterisation, replace the PCB. |
| F.64 | Fault: PCB / sensor / analog to digital transformer | Defect in the A/D converter or sensor reading stage in the PCB. Rule out NTCs and wiring (resistance/continuity measurement); if they are correct and F.64 persists, the cause is the PCB. |
| F.65 | Error: electronics temperature too high | The PCB electronics detect overheating (sensor/measurement on PCB). Check ventilation and thermal conditions; if the F.65 reappears when cold after ruling out external causes, the PCB is defective. |
| F.67 | Incorrect value returned by ASIC (flame signal) | Fault in the detection/ASIC stage of the board that evaluates ionisation. Check electrode, cable, and grounding; if everything is correct and the signal is still not plausible, the fault is in the PCB. |
| F.70 | Invalid product code (DSN) | Main PCB and interface mounted without recoding the DSN/power class resistor or incompatible. Check and recode in service menu (.d.93); if it does not accept coding or reappears, replace/parameterize the correct PCB. |
| F.61 | Error: gas valve control | Fault in the driver/output of the control board that governs the coils of the gas valve. Rule out shorts in the harness and coils; if they are correct and the manual considers 'defective electronics', the PCB is 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 0020039204 PCB.
- Catalogue reference
- 0020039204
- Brand
- Saunier Duval
- Type of part
- PCBs (control boards)
- Units in stock
- 0 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.
- silkscreen code (PCB)
- 0020019951-1.6
- equivalent commercial reference
- 0020039204
- flammability classification of the material
- 94V-0
- fuse
- T2A
- manufacturer
- Saunier Duval (Vaillant Group)
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval SemiaTek F 24-ME Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the PCB 0020039204
Is the code 0020019951-1.6 printed on the PCB the same part as the commercial reference 0020039204?
What fuse does the PCB of the Saunier Duval Semiatek F24 E use?
Is this PCB compatible with the Saunier Duval Semia F24?
What electronic platform is used for the PCB of the Semiatek F24 E?
Spare parts related to Saunier Duval SemiaTek F
