PCB Boiler Saunier Duval Isofast C28 E1
The PCB of the Saunier Duval Isofast C28 E1 boiler is the component that controls the ignition, burner modulation, pump, and safety features of the unit. When it fails, the boiler may not start, become locked, or exhibit erratic operation. Users may notice fault codes such as 13, which indicates a fault in the main printed circuit, or 20, which signals a communication defect between the user interface and the main board. This board is compatible with other models in the Isofast range, such as the C 28 E1 NOX and the C 35 E1, among others. A technician must confirm through diagnosis whether it needs to be replaced when the mentioned symptoms or associated fault codes occur.
- 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, does not respond to the controls, and the display is off.
Cause: The PCB receives power, but it does not activate its internal circuits because the input fuse has blown.
Unplug the boiler and check the fuse on the PCB; if it is black or the filament is broken, it may be the cause of the problem.
- 02
The display and indicator lights are off, even though the boiler is powered.
Cause: The transformer on the PCB may be failing and is not powering the display or the control electronics.
Check that there is power to the boiler by testing other devices and ensuring that the circuit breaker has not tripped.
- 03
The boiler does not respond to the controls, although it seems to have power.
Cause: The microprocessor on the PCB may be locked or damaged, preventing it from processing commands despite receiving power.
Disconnect the boiler from the power supply for two minutes and then reconnect it; if it still does not respond, the problem may be with the PCB.
- 04
The fuse on the PCB is blown, blackened, or has a broken filament.
Cause: A blown fuse indicates a short circuit or overload in some component of the PCB, it is not just a failure of the fuse.
Before changing the fuse, check for burnt components or any burnt smell; if the fuse blows again, the problem is more serious.
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
- MEIC28E1
- 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.
- Voltage
- 230V (printed on the edge of the PCB)
- Marked on the edge of the PCB
- ZIG
- Transformer
- myrra (clearly legible logo)
Frequently asked questions about the PCB S1019000
Is this PCB suitable for an Isofast C24E V1 or only for the C28E1?
When should the PCB of the Isofast C28E1 be replaced?
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