Saunier Duval Isofast F 28 E1 PCB (control board)
When you turn on the tap or activate the heating, the Saunier Duval Isofast F 28 E1 PCB (reference S1047000) is responsible for controlling the ignition, the modulation of the burner, and the boiler pump. If it fails, you may notice that the boiler does not start, gets locked, or exhibits erratic behavior, displaying fault codes such as 13 or 20. This PCB is compatible with several models from the Isofast and Isomax ranges, including the F 28 E1 and C 28 E1, among others. A technician must confirm through diagnosis whether it needs to be replaced when the mentioned symptoms occur or a communication fault is indicated.
- Type of part
- PCBs (control boards)
- Status
- Refurbished
- Catalogue reference
- S1019000
- Warranty
- 1 year
Saunier 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
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- 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 that require diagnosis on the PCB S1019000
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 no LED is active on the PCB.
Cause: The PCB is not receiving power, often due to a blown internal fuse.
Measure the continuity of the 125 mA fuse on the PCB; if it is blown, it is very likely to be the problem.
- 02
The display or the control does not start even though the boiler has power at the main input.
Cause: The PCB does not distribute the current to the rest of the control circuit.
Measure the output of the transformer on the PCB before deciding to replace it.
- 03
The boiler starts normally but loses the time or the programming.
Cause: The PCB does not consistently retain the configuration memory.
Reprogram and monitor if it loses connection again within a few hours before replacing the PCB.
- 04
A different fault occurs every few days, with no clear pattern.
Cause: An intermittent fault in the PCB causes variable errors in each ignition cycle.
Keep a record of the codes that appear; it will help you differentiate between a PCB fault and one related to a sensor or pressure switch that repeats.
Fault codes Saunier Duval that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| 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
- Uniclima internal SKU
- CECIF28E1
- Brand
- Saunier Duval
- Type of part
- PCBs (control boards)
- Units in stock
- 1 unit
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Part data and available documentation
Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.
- Fuse
- 125 mA T, 250V
- Transformer
- Myrra (red, legible logo on the PCB)
Frequently asked questions about the PCB S1019000
What fuse does the PCB of the Isofast F 28 E1 use?
Does this PCB work for an Isofast C 35 E1 in addition to the F 28 E1?
What transformer is installed on the PCB of the Isofast F 28 E1?
Spare parts related to Saunier Duval Isomax
