Display Module Saunier Duval Isofast/Isosplit/Isomax Ref. S1072300
The Saunier Duval Isofast/Isosplit/Isomax display module is a control PCB that manages the ignition, burner modulation, pump, and safety features of the boiler. When it malfunctions, the boiler may fail to start, lock out, or operate erratically, which can be reflected in fault codes such as F12, F18, or F13. This module is compatible with models from the Isofast Condens, Isofast, and Isomax ranges, among others. It is recommended to replace the part when these symptoms or fault codes are detected.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference S1072300
PCB with reference S1072300. Seven confirmed compatibilities: F 30 E and F 35 E.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval F 30 E | Isofast Condens | Contrasted |
| Saunier Duval F 35 E | Isofast Condens | Contrasted |
| Saunier Duval F 30 E H-MOD | Isofast | Contrasted |
| Saunier Duval F 35 E H-MOD | Isofast | Contrasted |
| Saunier Duval F 35 EA | Isofast | Contrasted |
| Saunier Duval F 35 E | Isomax | Contrasted |
| Saunier Duval Condens F 35 E | 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. S1072300 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 S1072300. 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 S1072300 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 display shows no signs of life, not even a flicker, when turning on the boiler.
Cause: The module is not receiving power from the main PCB due to a poorly inserted or damaged flat cable.
Turn off and turn on the boiler with the flat connector securely tightened at both ends and check if the display reacts before replacing the part.
- 02
When pressing the buttons, nothing happens, even though the screen is lit.
Cause: The circuit of the push buttons within the module degrades with use, regardless of whether the LCD continues to function.
Test each button separately and note if any respond: if none do, it is more likely that it is the complete module and not a single button.
- 03
The screen appears with stripes, cut-off letters, or missing digits.
Cause: The LCD panel of the module itself is failing, a common wear issue in these panels after years of use.
Compare what it shows with the boiler manual to rule out that it is a misinterpreted fault code and not a physical screen fault.
- 04
The boiler is still working, but there is no way to read the fault code or reprogram it.
Cause: The display module is the only communication interface with the electronics; its failure does not imply that the power PCB is damaged.
Check if the water is coming out hot and the heating is working: if so, focus the inspection on the module rather than the main PCB.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F12 | No signal from the user interface | Yes — it points to this display/interface module or its connection cable with the main PCB. |
| F18 | User interface fault | Yes — it corresponds to this display/control board module. |
| F13 | Main PCB fault | No — that code is for the MAIN PCB (a different part), not for this display. |
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 S1072300 PCB.
- Catalogue reference
- S1072300
- 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 F 35 E H-MOD Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the PCB S1072300
Is this module S1072300 compatible with the Isofast F 30 EA?
When does this display module fail and need to be replaced in the Isosplit F 35 E H-MOD?
Spare parts related to Saunier Duval Isofast
