Saunier Duval Isofast F35 EA PCB Ref. 0310144400E5
Saunier Duval Isofast F35 EA PCB Ref. 0310144400E5 is the component that controls the ignition, burner modulation, pump, and 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 PCB is compatible with models from the Isofast range, such as the Isofast F35 EA and the Isofast F30 EA, among others. A technician must confirm through diagnosis whether it needs to be replaced when it shows operational faults or recurring errors.
- Type of part
- PCBs (control boards)
- Status
- Refurbished
- Catalogue reference
- 0310144400E5
- Warranty
- 1 year
Saunier Duval boilers compatible with reference 0310144400E5
PCB with reference 0310144400E5. Four confirmed compatibilities: Isofast F35 EA and Isofast F30 EA.
Verified compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Isofast F35 EA | Isofast | Verified |
| Saunier Duval Isofast F30 EA | Isofast | Verified |
| Saunier Duval Isofast F35 E H-MOD | Isofast | Verified |
| Saunier Duval Isofast F30 E H-MOD | Isofast | Verified |
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.
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- 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 that require diagnosis on the PCB 0310144400E5
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.
Do not bridge contacts or power components directly to test them. Request a technician to check the cause according to the model manual and its revision, without bypassing the protections. The symptom or fault code does not confirm on its own that this part is faulty.
- 05
The boiler does not ignite: the room thermostat flashes with fault code 01 or 04.
Cause: The burner does not ignite or the flame is not detected. There may be a lack of gas.
Press the thermostat button and follow its instructions. If it appears again, have a technician check it.
- 06
The boiler does not ignite: the fault code F28 appears (ignition fault).
Cause: Failed ignition: it could be gas, ignition, electrode, or PCB.
Have a technician check it.
- 07
The boiler shuts down during operation and does not restart (fault code F29).
Cause: Gas cut-off, flue gas recirculation, condensates, or faulty grounding.
Have a technician check it.
- 08
The boiler does not ignite when starting and fault code F.28 appears.
Cause: Insufficient gas, condensate siphon blocked or failed ignition.
Have a technician check the gas, the siphon, and the electrode. Do not touch the gas valve.
- 09
The flame goes out during operation and the boiler tries to ignite several times.
Cause: Dirty ionization electrode, flue gas recirculation or gas cut-off.
Have a technician check the electrode, the flue gases, and the gas supply.
- 10
Fault codes F.00, F.01, F.10 or F.11 appear on the screen.
Cause: Loose sensor connector, interrupted wiring harness, or faulty NTC sensor.
Have a technician check the connectors first and then the sensor.
- 11
The red pilot light is flashing and a fault code F followed by a number appears on the screen: the boiler stops due to an anomaly.
Cause: The PCB has detected an anomaly. The number indicates which one: ignition, flue, sensors, or circulation.
Reset it: turn off the boiler, wait 5 seconds, and turn it back on. If the fault persists, have it checked by the official technical service.
Fault codes Saunier Duval that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| 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. |
| F.28 | Start-up fault: ignition does not complete. | Code with a dot, typical of the Isofast Condens. It may be due to the gas, ignition, or the PCB; have a technician check it. |
| F00 | Return temperature sensor (NTC2) disconnected. | Check if the sensor connector is loose. If it persists, have a technician check it: it could be the sensor, the cable, or the PCB. |
| F01 | Return temperature sensor (NTC5) disconnected. | Just like the F00: check the connector and, if it persists, have a technician check it. |
| F27 | Flame detection fault: the flame control is not reliable. | If it occurs when turning on or off, have a technician check it: it could be moisture in the electronics or the flame control. |
| F29 | Flame loss during operation. | If it repeats, have a technician check it: it could be a gas cut-off, flue gas recirculation, or a faulty ground connection. |
| F61 | Gas valve activation fault. | Have a technician check it: it could be the wiring of the gas valve, its coils, or the electronics. |
| F62 | The gas valve does not close in time after the flame goes out. | Have a technician check it: the gas valve or the PCB are the suspects. |
| F.10 | Short circuit in the supply temperature sensor (inlet). | Have a technician check the sensor and the wiring harness. Only point to the PCB if the sensor and wiring are fine. |
| F.11 | Short circuit in the return temperature sensor. | Have a technician check the sensor and the wiring harness. Only point to the PCB if the sensor and wiring are fine. |
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
- Uniclima internal SKU
- PLSA110
- Brand
- Saunier Duval
- Type of part
- PCBs (control boards)
- Units in stock
- 3 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Part data and available documentation
Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.
- 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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