Saunier Duval Isofast/Isosplit/Isomax Display Interface Module Ref. S1072300
When you turn on the heating, the Saunier Duval Isofast/Isosplit/Isomax Display Interface Module Ref. S1072300 is responsible for controlling the ignition, the modulation of the burner, the pump, and the safety features of the boiler. If this PCB presents faults, it is possible that the boiler will not start, will lock out, or will operate erratically, displaying errors such as F12, F18, or F13. This module is compatible with models from the Isofast and Isomax ranges, such as the F 30 E H-MOD and the F 35 E. It is recommended to replace it when these symptoms or errors are detected to avoid issues with the operation of the boiler.
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 screen is completely off, with no icons or light.
Cause: The interface module is not receiving power or the cable connecting it to the main PCB is improperly connected.
Check if the boiler is still heating normally despite the screen being off: if it heats, the fault is with the module, not with the power PCB.
- 02
The buttons do not respond even though the screen is on.
Cause: The button membrane of the module is worn out or the contact with the PCB is oxidized.
Turn off the power, disconnect the flat connector, clean the pins with a dry cloth, and reconnect it before declaring the module faulty.
- 03
The screen displays incomplete symbols, flickers, or is partially visible.
Cause: It is a typical symptom of LCD degradation in the module, different from a total power failure.
Note which segments or icons are missing and when they appear, during startup, with use, or with heat, to confirm that it is the LCD and not the power supply.
- 04
The temperature cannot be seen or adjusted from the panel.
Cause: The interface module is the only visual and tactile control point; if it fails, the boiler can continue operating with the last saved configuration.
Check if the boiler is still providing hot water or heating normally: this confirms that the problem is in the display module, not in the power electronics.
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
- 5 units
- 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 suitable for the Isosplit Condens F 35 E?
When should this screen interface module of the Isofast Condens F 30 E be replaced?
Spare parts related to Saunier Duval Isofast
