Saunier Duval Isofast F 35 E H Extractor Fan MOD Ref. S1072500
The Saunier Duval Isofast F 35 E H MOD Extractor Fan Ref. S1072500 is a component that evacuates combustion gases and creates the necessary draft for the boiler to start. When it fails, the boiler does not ignite or locks out due to a flue gas evacuation problem, which can result in fault codes F2, 02, or 10. This fan is compatible with several models, including Themafast F 30 E, Isofast F 30 E H-MOD, and Themaclassic F AS 30 E, among others. It is advisable to replace it when a fault in its operation occurs.
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Consult via WhatsAppSaunier Duval boilers compatible with reference S1072500
Extractor with reference S1072500. Six confirmed compatibilities: Themafast F 30 E and Themafast F 30 E H-MOD.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Themafast F 30 E | Themafast | Contrasted |
| Saunier Duval Themafast F 30 E H-MOD | Themafast | Contrasted |
| Saunier Duval Isofast F 30 E H-MOD | Isofast | Contrasted |
| Saunier Duval Isofast F 35 E H-MOD | Isofast | Contrasted |
| Saunier Duval Isotwin F 30 H-MOD | Isotwin | Contrasted |
| Saunier Duval Themaclassic F AS 30 E | Themaclassic | 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. S1072500 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 S1072500. 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 extractor S1072500 resolves.
The extractor evacuates the combustion gases with forced draft. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The boiler does not ignite and shows a flue gas extraction or draft fault as soon as it is attempted.
Cause: If the extractor does not confirm the extraction within the time set by the control unit, it will cut off the ignition attempt for safety reasons.
First, check that the exhaust duct to the outside is not blocked by snow, leaves, or a nest before replacing the fan.
- 02
The extractor makes noise or vibrates while it is running, more noticeable at maximum power.
Cause: The noise that only appears at high speed often indicates a worn bearing that is hardly noticeable at low revolutions.
Listen to see if the noise clearly increases when the demand for heating or domestic hot water rises; if so, it points more towards a mechanical fault than an electronic one.
- 03
The extractor does not spin or spins unevenly, starting and stopping on its own.
Cause: An intermittent turn is usually caused by a partially seized bearing or a loose electrical connection at the motor connector.
Visually inspect the extractor connector and its terminals before declaring the part faulty; a poor connection mimics the same symptom.
- 04
The boiler repeatedly locks out shortly after starting, although the fan seems to be running.
Cause: The extractor can rotate but may not generate sufficient suction if there is an air leak in the casing joint or the turbine is damaged.
Check that the casing of the extractor is properly closed and without visible cracks before replacing the complete assembly.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F2 | Air deficiency safety (airflow/air intake fault). | The faulty, blocked, or unpowered extractor (fan) does not generate the necessary depression, the pressure switch does not switch, and the boiler enters F2; check voltage to the motor, free rotation/noise, and switching of the air pressure switch. |
| 02 | Airflow safety (extraction/aspiration fault) in ISOFAST ranges F. | Extractor fault prevents correct airflow/smoke flow and activates safety 02; check power supply to the fan, ensure it rotates without friction, check the condition of pressure tubes and pressure switch, and ensure the duct is not obstructed. |
| 10 | Fan fault in ISOFAST ranges F. | Fault in the extractor (motor/wiring/tachometer) detected by the electronics; check power supply and signal return, motor continuity, and ensure the fan is not blocked. |
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.
Saunier Duval S1072500 fan datasheet
- Catalogue reference
- S1072500
- Brand
- Saunier Duval
- Type of part
- Extractor fans
- Units in stock
- 6 units
- 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.
- CE marking
- present (CE mark visible on the motor label)
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval Isofast F 35 E H-MOD Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the extractor S1072500
Is this extractor compatible with a Saunier Duval Isofast F 35 E?
What fault does this extractor resolve in a Saunier Duval Themaclassic F 35 E?
Spare parts related to Saunier Duval Themafast
