Saunier Duval Isomax Condens F 35E Display Ref. S1072300
When you turn on the tap or activate the heating, the Saunier Duval Isomax Condens F 35E display is responsible for managing the ignition, burner modulation, pump, and safety features of the boiler. If it fails, you will notice that the boiler does not start, gets locked, or exhibits erratic behavior. This part is compatible with several boilers from the Isofast and Isomax ranges, such as the F 30 E, F 35 E, and Condens F 35 E models, among others. It is recommended to replace it when you experience these symptoms to restore the operation of your system.
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 does not turn on, it remains completely black, although the boiler starts and provides heat.
Cause: The screen is not receiving power or there is a connection problem with the main PCB, leaving it isolated from the system.
Check if you can hear the fan and if the boiler is operating normally; if so, the fault is in the display and not in the power PCB.
- 02
The buttons on the panel are unresponsive, you cannot change the temperature or view the menus.
Cause: The keyboard is on the same PCB as the screen, so a fault in the circuit affects both.
Turn off the power to the boiler from the main switch for a couple of minutes and then turn it back on to rule out a temporary hang-up before replacing the part.
- 03
The screen appears blurry, with stripes or with parts that do not light up.
Cause: The screen chip or its soldering to the PCB deteriorates with heat and time, causing a faulty image before it completely fails.
Measure if the fault appears consistently or changes with the ambient temperature; if it varies with heat, it points more towards a soldering issue than the display itself.
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
- Delivery time shown at checkout
- 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
Does this screen fit a Saunier Duval Isofast Condens F 35 E?
Does this screen also fit a Saunier Duval Isomax F 35 E?
How many models are compatible with this display?
When should the boiler display be replaced?
What fault codes are documented for this display?
Spare parts related to Saunier Duval Isofast
