Saunier Duval Isofast F35 EA PCB Ref. 0310144400E5
The PCB Saunier Duval Isofast F35 EA Ref. 0310144400E5 is the component that controls the ignition, the modulation of the burner, the pump, and the safety features of the boiler. When it fails, the boiler may not start, become locked, or behave erratically, which can lead to fault codes such as F12, F13, or F20. This board is compatible with models from the Isofast range, such as the Isofast F35 EA and the Isofast F30 EA, among others. It is recommended to replace it when it shows operational failures or recurring errors.
Saunier Duval boilers compatible with reference 0310144400E5
PCB with reference 0310144400E5. Four confirmed compatibilities: Isofast F35 EA and Isofast F30 EA.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Isofast F35 EA | Isofast | Contrasted |
| Saunier Duval Isofast F30 EA | Isofast | Contrasted |
| Saunier Duval Isofast F35 E H-MOD | Isofast | Contrasted |
| Saunier Duval Isofast F30 E H-MOD | Isofast | 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 the reference 0310144400E5 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 0310144400E5. 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 0310144400E5 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 boiler does not start and nothing appears on the display.
Cause: The transformer or the power supply stage of the PCB may have failed.
Check that power is reaching the boiler and inspect the fuse on the PCB before replacing it.
- 02
A fault code related to pressure or temperature is triggered even though the values seem correct.
Cause: The PCB may be misinterpreting the signal from the corresponding sensor.
Measure the sensor involved with an ohmmeter before declaring the PCB defective.
- 03
The boiler heats but stops modulating, it always operates at the same power.
Cause: The modulation control stage of the PCB may have stopped varying the signal to the burner.
Check that the fault persists in several operating modes before replacing the PCB.
- 04
The room thermostat is unable to start the boiler even though it is calling for heat.
Cause: The input of the PCB that receives the demand from the thermostat may not be responding.
Directly bridge the terminals of the thermostat on the PCB to check if it starts before replacing it.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F12 | Main PCB circuit fault (PCB ↔ interface connection). | The main PCB does not establish/receive communication with the control board (internal fault of the PCB or its auxiliary voltages). Check 230 V input and 5/12 V on the board, continuity of the interface harness–PCB, and if the interface and wiring are OK, replace the board. |
| F13 | Main printed circuit board fault. | Internal defect of the PCB (cold solder joints, relays/controller, power supply) causing loss of management/communication. Check voltages on the PCB, perform a visual inspection, and rule out the interface and harness; if the issue persists, replace the PCB. |
| F20 | Software incompatibility (interface ↔ PCB/product code). | After changing the PCB or display with an incompatible version/code, the PCB locks due to software mismatch. Verify variants/product code and versions on the label/technical menu, reconfigure or install a compatible 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 0310144400E5 PCB.
- Catalogue reference
- 0310144400E5
- 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.
- Code printed on PCB
- 0310144400E5
- Screen printing
- SYMSI7.0
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval Isofast F35 EA Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the PCB 0310144400E5
What code do I need to locate on my PCB to confirm that it is 0310144400E5?
Does this PCB fit the Saunier Duval Isofast F30 E-A?
Is the Ref. 0310144400E5 compatible with the Isofast F35 E H-MOD?
When should this PCB be replaced in the Isofast Condens F35 E?
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