Hermann Fan Extractor Micraplus NOx 24 B 2 Ref. 0020039199
The Hermann Micraplus boilers, among others, use the Hermann Extractor Fan Micraplus NOX 24 B 2 Ref. 0020039199. This extractor is responsible for expelling combustion gases and generating the necessary draft for the boiler ignition. If it fails, you may notice that the boiler does not ignite or locks out due to a flue gas evacuation issue. It is compatible with models such as Micraplus NOX 24 and Micraplus 24, as well as some from the Saunier Duval Semia range. A technician must confirm through diagnosis whether it needs to be replaced if you observe fault codes F.32 or F.33.
- Type of part
- Extractor fans
- Status
- Refurbished
- Catalogue reference
- 0020039199
- Warranty
- 1 year
Hermann boilers compatible with reference 0020039199
Extractor with reference 0020039199. Three confirmed compatibilities: Micraplus NOX 24 and Micraplus 24.
Verified compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Hermann Micraplus NOx 24 | Hermann Micraplus | Verified |
| Hermann Micraplus 24 | Hermann Micraplus | Verified |
| Hermann Semia TEK F24 | Saunier Duval Semia | 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 ref. 0020039199 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 0020039199. 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 in the extractor 0020039199
The extractor evacuates the combustion gases with forced draft. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
A loud noise or a noticeable vibration is heard when starting the extractor.
Cause: The turbine may have a worn bearing or a deteriorated O-ring, causing the impeller to rub against the volute.
Check if the noise is accompanied by vibration throughout the metal casing; if so, it points directly to the extractor.
- 02
The boiler is locking out or not igniting, with no activity from the fan.
Cause: If the turbine does not spin, the system that confirms the evacuation of gases never gives the signal for gas flow.
Check if you notice or hear the start of the extractor when requesting heat; its complete absence confirms that the fault is there.
- 03
The extractor starts but struggles to gain speed, as if it is having difficulty spinning.
Cause: The shaft may be partially seized or the sealing O-ring may be rubbing due to deformation.
With the boiler disconnected, turn the impeller by hand and check for any resistance or stiff spots in the rotation.
Hermann fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| F.32 | Frost protection function of the fan active: fan revolutions exceed tolerance values. | The fan/extractor is blocked, without power or without Hall signal, and the PCB detects rpm out of range. Check the connector and 230 V to the fan, Hall/tachometer signal, and ensure it rotates freely during pre-ventilation. |
| F.33 | Pressure losses in the air intake/exhaust gas system are too large. | The fan does not overcome the pressure loss of the air-flue circuit (motor/blades fatigued) and the pressure switch does not confirm. Check the fan's rpm/consumption, ensure it is not obstructed, and measure differential pressure/pressure switch during pre-ventilation. |
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 extractor Hermann 0020039199
- Catalogue reference
- 0020039199
- Uniclima internal SKU
- EXHNNX24
- Brand
- Hermann
- Type of part
- Extractor fans
- Units in stock
- 3 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Frequently asked questions about the extractor 0020039199
Does this extractor work for a Saunier Duval Semia Tek F24 boiler?
What does this extractor from the Hermann Micraplus NOX 24 include?
When should this fan be replaced in a Saunier Duval Semia Tek F24?
