Extractor Fan For Boiler Isofast F35E Ref. S1072500
If your boiler does not ignite or gets blocked, you may need the extractor fan for the Isofast F35E boiler, reference S1072500. This part is responsible for expelling combustion gases and creating the necessary draft for the boiler to start. When it fails, you may notice that the boiler shows faults such as F2, 02, or 10, indicating air flow issues. This fan is compatible with models such as Themafast F 30 E, Isofast F 30 E H-MOD, among others. It is recommended to replace it when the boiler shows these failure symptoms.
VAT included
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 respond when heat is requested, you can't even hear the fan trying.
Cause: The extractor motor may be stopped due to an internal fault and does not generate the signal that the control board needs to continue the ignition.
Measure if the fan receives voltage at its connector before replacing it: if it is not getting power, the fault may be in the PCB, not in the fan.
- 02
It turns on, makes an attempt, and after a few seconds, it turns off by itself again.
Cause: The fan does not reach the rotational speed that the air pressure switch requires to validate ignition.
Before replacing the part, visually check that the impeller rotates freely and without rubbing against the volute.
- 03
Metallic noise or strange buzzing when the fan starts that it didn't make before.
Cause: It is usually due to a worn bearing or the impeller touching the casing due to imbalance.
With the boiler turned off, move the fan shaft with your fingers: if it has play or makes noise, it confirms mechanical wear.
- 04
There is a combustion smell, or the boiler locks out with a fault code related to the draft.
Cause: The extractor is not properly expelling the gases to the outside, either due to wear and tear or because the duct is partially obstructed.
Check the duct and the external terminal before considering the part as faulty: an external obstruction gives the same symptom.
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
- 5 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- 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 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 fan Ref. S1072500 compatible with the Themafast F 30 E H-MOD boiler?
What is the function of this fan in the combustion circuit of the Isofast F 35 E H-MOD?
When should this fan be replaced in an Isofast F 30 E H-MOD boiler?
How many models are compatible with the extractor fan Ref. S1072500?
What fault codes are documented for this fan?
Where can I find more information about the compatibility of this fan?
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