Ebm-papst Extractor Fan NRG118 Viessmann Vitodens 100-W Ref. 7861604
Radial flue gas fan, manufactured by ebm-papst (model NRG 118 19/26), for Viessmann Vitodens 100-W WB1C, BPJA, B1KA, and B1HA boilers. It expels combustion gases and regulates the draft of the boiler. It should be replaced when it makes noise, vibrates, fails to start, or the boiler locks due to an air pressure switch fault.
VAT included
Consult via WhatsAppViessmann boilers compatible with reference 7861604
Extractor with reference 7861604. A proven compatibility: Vitodens 100-W WB1C.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Viessmann Vitodens 100-W WB1C | Viessmann Vitodens 100-W | 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. 7861604 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 7861604. 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 7861604 solves.
The extractor evacuates the combustion gases with forced draft. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The fan makes noise or vibrates when starting.
Cause: It may be due to a worn bearing or a dirty and unbalanced impeller from use.
Open the cover and check if the impeller has soot or dust buildup: sometimes, a cleaning is enough before replacing the fan.
- 02
The fan does not start, the boiler tries to ignite but there is no rotation.
Cause: The extractor motor may be seized, and without its rotation signal, the control unit does not allow the gas to flow.
With the boiler turned off, manually turn the fan blade: if it's very difficult or doesn't turn, the mechanical fault is evident.
- 03
The boiler locks out and indicates a fault with the air pressure switch or the fan.
Cause: The pressure switch verifies that the fan is spinning at the correct speed; if it is slow or stopped, the pressure switch does not close and the boiler shuts down for safety.
Check that the silicone tubes between the pressure switch and the extractor are not loose, bent, or obstructed before replacing the fan.
- 04
The boiler does not manage to ignite the burner; it remains in the attempt.
Cause: Without the correct airflow, the control board does not authorize the opening of the gas valve and interrupts the sequence prematurely.
Check that the flue is not blocked by nests, ice, or dirt before replacing the fan.
Fault codes Viessmann that this part solves
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F9 | Fan speed too low when starting the burner (burner lockout). | The radial extractor does not reach the prescribed rpm, so the rotation/pressure signal is not confirmed and the control locks. Check the fan power/signal and connectors, and rule out friction or obstructions. |
| FA | Fan not in standstill when it should be (burner lockout). | The extractor keeps spinning or reports a rotation signal at rest, preventing the safety check. Verify that the fan is stopped in standby and check the fan wiring/control. |
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.
Viessmann 7861604 fan datasheet
- Catalogue reference
- 7861604
- Brand
- Viessmann
- Type of part
- Extractor fans
- Units in stock
- 1 unit
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- 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.
- Motor manufacturer
- ebm-papst
- Engine model
- NRG 118 19/26
- Viessmann part code
- 7861604
- Compatibility and power ratings
- Vitodens 100-W WB1C (19 and 26 kW), BPJA (25 and 29 kW), B1KA (26 kW), B1HA (19 and 26 kW)
Frequently asked questions about the extractor 7861604
Who manufactures this extractor fan for the Vitodens 100-W?
What model of ebm-papst fan is installed in the Vitodens 100-W?
Does this extractor NRG 118 work for the Vitodens 100-W B1HA?
What is the Viessmann reference for this ebm-papst extractor?
Why does this fan of the Vitodens 100-W need to be replaced?
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