Saunier Duval Isofast C 35 E1 PCB (control board)
The Saunier Duval Isofast C 35 E1 PCB, manufactured by Myrra and with reference S1019000, is responsible for controlling the ignition, burner modulation, pump, and safety features of the boiler. When this part fails, the boiler may not start, become locked, or exhibit erratic operation, which can lead to fault codes such as 13: Main printed circuit board fault or 20: Communication defect between the user interface and the main board. It is compatible with several models, including the C 28 E1, C 35 E1, and F 28 E1, among others. It is recommended to replace it when the mentioned symptoms occur or a fault in the board is indicated.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference S1019000
PCB with reference S1019000. 11 verified compatibilities: C 28 E1 and C 28 E1 NOX.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval C 28 E1 | Isofast | Contrasted |
| Saunier Duval C 28 E1 NOx | Isofast | Contrasted |
| Saunier Duval C 35 E1 | Isofast | Contrasted |
| Saunier Duval F 28 E1 | Isofast | Contrasted |
| Saunier Duval F 35 E1 | Isofast | Contrasted |
| Saunier Duval C 28 E2 | Isomax | Contrasted |
| Saunier Duval C 28 E204 | Isomax | Contrasted |
| Saunier Duval C 28 E205 | Isomax | Contrasted |
| Saunier Duval F 28 E2 | Isomax | Contrasted |
| Saunier Duval F 28 E204 | Isomax | Contrasted |
| Saunier Duval F 28 E205 | Isomax | 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. S1019000 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 S1019000. 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 S1019000 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 and the display is off.
Cause: The PCB does not receive or distribute power to its circuits.
Check the input voltage and the fuse before considering the PCB as faulty.
- 02
An error code related to the PCB or a sensor appears.
Cause: The electronics prevent ignition by detecting an incorrect reading.
Note the code and check if it indicates a specific sensor before replacing the entire PCB.
- 03
The flame modulation is unstable or cuts off intermittently.
Cause: The PCB does not send a constant signal to the gas valve.
Check if the fault coincides with changes in the heat demand, as this indicates that the problem may be with the PCB rather than the gas valve.
- 04
The boiler takes time to respond or restarts by itself from time to time.
Cause: A specific fault in the microprocessor of the PCB causes unexpected reboots.
Check if the reset coincides with peaks in electrical consumption in the house before assuming it is the PCB.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| 13 | Main printed circuit board fault. | The main PCB (S1019000) does not pass the internal self-diagnosis; this is usually due to an electronics/EEPROM fault or the PCB not generating its internal voltages. Check the 230 V input, fuse, and low voltages (5/15/24 V) on the PCB; if these are correct and the wiring is OK, replace the PCB. |
| 20 | Communication fault between the user interface and the main PCB. | Communication channel/ebus fault on the main board, incompatibility between interface and PCB or defective connection/harness. Check the interface power supply from the board, connectors/harness and test with a known interface; if it persists, the cause is 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 S1019000 PCB.
- Catalogue reference
- S1019000
- 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.
- Brand printed on the PCB
- SAUNIER DUVAL
- Transformer manufacturer
- Myrra
- Values printed on the transformer
- 230V / 3V / SW3
Frequently asked questions about the PCB S1019000
Does this PCB fit a Saunier Duval Isomax C 28 E2?
What transformer is mounted on the PCB of the Saunier Duval Isofast C 35 E1?
What function does this PCB serve in the Isofast C 35 E1?
Spare parts related to Saunier Duval Isomax
