Saunier Duval Themafast NOx F 30 B 2 Extractor Ref. 0020124899
The Saunier Duval Themafast NOX F 30 B 2 extractor is a flue fan that evacuates combustion gases and creates the necessary draft for the boiler to start. When it fails, the boiler may not ignite or may lock out due to issues with flue gas evacuation, presenting symptoms such as fault code F2: Air safety lack or F33: Air flow failure. This extractor is compatible with the Themafast NOX F 30 B2 and Themafast NOX F 30 models, among others. It should be replaced when these operational issues are detected.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference 0020124899
Extractor with reference 0020124899. Two confirmed compatibilities: Themafast NOX F 30 B2 and Themafast NOX F 30.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Themafast NOx F 30 B2 | Themafast NOX | Contrasted |
| Saunier Duval Themafast NOx F 30 | Themafast NOX | 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 ref. 0020124899 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 0020124899. If it is not visible, do not identify the part by 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 0020124899 resolves.
The extractor evacuates the combustion gases with forced draft. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
When turning on the boiler, the fan makes a sound for a moment and the boiler shuts down without igniting the flame.
Cause: The extractor does not spin enough for the control to confirm the evacuation of fumes, preventing the gas from opening.
Turn the turbine by hand with the boiler turned off and unplugged: if it is stiff or makes noise, it confirms the suspicion.
- 02
The boiler is working, but there is a rubbing or vibrating noise that wasn't there before.
Cause: The wear of the shaft or the bearing of the extractor causes the turbine to rub against the casing.
Check if the noise increases when raising the power of the boiler; if so, point to the fan before considering other parts.
- 03
A warning of flue or gas evacuation fault appears on the screen.
Cause: The control system needs to confirm that the extractor is spinning correctly before allowing ignition, and it locks out if it fails to do so.
Check that the exhaust duct to the outside is not blocked, bent, or has any element that prevents evacuation.
- 04
The extractor does not start at any moment, nor is there any sound from the motor trying to start.
Cause: This could be because the extractor motor has burned out or because it is not receiving power.
Check with a multimeter if the extractor connector is receiving voltage before declaring the part faulty.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F2 | Air deficiency safety (lack of draft). | The extractor/fan does not generate the necessary depression and the air pressure switch does not switch; the PCB locks with F2. Check the power supply and rotation of the fan, clean the turbine/venturi, and ensure the pressure switch closes (differential manometer/continuity). |
| F33 | Air flow fault. | Insufficient performance or extractor blockage prevents achieving the flow/depression, and the air pressure switch remains open, displaying F33. Check that the fan is operating at the correct speed and that the pressure switch is switching (depression in venturi/continuity), as well as possible obstructions in the exhaust. |
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 extractor 0020124899
- Catalogue reference
- 0020124899
- Brand
- Saunier Duval
- Type of part
- Extractor fans
- Units in stock
- 3 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- 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 Themafast NOX F 30 B2 Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the extractor 0020124899
Is this extractor compatible with the Themafast NOX F30 boiler?
Spare parts related to Saunier Duval Themafast NOX
