Saunier Duval Isofast Condens F 35 E Display PCB Ref. S1072300
When you turn on the tap or activate the heating, the Saunier Duval Isofast Condens F 35 E Control Board is responsible for managing the ignition, burner modulation, pump, and safety features of the boiler. If this part fails, you will notice that the boiler does not start, locks out, or behaves erratically, potentially displaying faults such as F12, F18, or F13. It is compatible with several models, including the Isofast Condens F 30 E and F 35 E, as well as others from the Isofast and Isomax ranges. It should be replaced when it shows operational issues or system errors.
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 at any time, not even when powering on the boiler.
Cause: The display board is not receiving power or its main chip has stopped booting.
Check that the boiler has power and that the other indicators, if any, light up to rule out a general power cut before replacing the PCB.
- 02
The screen appears blank or very faint, as if it lacks contrast.
Cause: The video controller on the PCB is not generating the display image correctly.
Look at the screen from different angles with a flashlight; if faint numbers can be seen, the fault may only be related to the backlighting and not the entire PCB.
- 03
The screen intermittently malfunctions: sometimes it displays well and other times it freezes or the image disappears.
Cause: A fault in the main chip, whose marking appears damaged, causes irregular interruptions in image processing.
Record if the fault worsens with the boiler hot; faults that only appear when hot usually point to a component on the PCB.
- 04
There is no way to tell at a glance if the PCB you have is exactly the same as the spare part, even though the box format matches.
Cause: These control boards share a casing among several models in the Isofast, Isomax, and Isosplit ranges, so the external appearance is not enough to confirm compatibility.
Before installing it, compare the position and the number of connectors of the flat cable with the faulty PCB, not just the size of the box.
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
Data read on the part and in the manufacturer's documentation
What we have not been able to verify does not appear here.
- voltage
- 16 V
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
For which models is the Saunier Duval Isofast Condens F 35 E Display Board Ref. S1072300 compatible?
What fault codes are documented for this control board?
Is the Saunier Duval Isofast Condens F 35 E Display PCB Ref. S1072300 suitable for my boiler?
What is the reference for this display PCB?
What should I do if my boiler shows a fault code F12?
Spare parts related to Saunier Duval Isofast
