Junkers Cerastar ZWN24 7MFA Extractor Ref. 8716011707
The extractor evacuates the combustion gases and creates the necessary draft for the boiler to start. This component, from the brand Junkers, has the reference 8716011707. If it fails, you will notice that the boiler does not ignite or gets locked, and the fault codes C1, C6, or C7 may appear. It is compatible with models from the Cerastar range, such as the ZWN24-7MFA23 and ZWN24-7MFA31, among others. It should be replaced when there are ignition or flue gas evacuation issues.
VAT included
Consult via WhatsAppJunkers boilers compatible with reference 8716011707
Extractor with reference 8716011707. Two confirmed compatibilities: ZWN24-7MFA23 (ZWN24-7MFA23S2800) and ZWN24-7MFA31 (ZWN24-7MFA31S2800).
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Junkers ZWN24-7MFA23 (ZWN24-7MFA23S2800) | Cerastar | Contrasted |
| Junkers ZWN24-7MFA31 (ZWN24-7MFA31S2800) | Cerastar | 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. 8716011707 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 8716011707. 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 8716011707 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 to the thermostat: it does not attempt to ignite.
Cause: The extractor does not receive the rotation signal, so the control unit does not open the ignition cycle to prevent gas from being introduced without evacuation.
Check if you can hear or feel the fan vibrating when requesting heat, even if it's just for a second; if it is completely silent, note that down.
- 02
The display or the indicator lights show a fault warning for air or flue gases.
Cause: The extractor does not spin fast enough for the pressure switch to detect the necessary depression.
Before changing anything, check that the flue outlet to the outside is not blocked by ice, a nest, or accumulated dirt.
- 03
It turns off by itself a few seconds after being turned on, again and again.
Cause: The extractor's rotation is insufficient, causing the boiler to shut down prematurely for safety reasons.
Listen to see if the motor starts normally or with a strange jerk; a forced start usually indicates worn bearings.
- 04
New and annoying noise while operating that wasn't there before.
Cause: The wear of the shaft or the accumulated dirt in the turbine disrupts the rotation of the extractor.
With the boiler unplugged, turn the turbine by hand; if it is difficult or squeaks, there is no need to continue looking for the cause elsewhere.
Fault codes from Junkers that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| C1 | The differential pressure switch has been activated during operation. | The extractor (flue fan) stops or rotates too slowly during operation and causes the pressure switch to change state; check the power supply and rpm signal of the fan, differential pressure of the pressure switch, and tubes/venturi. |
| C6 | The differential pressure switch does not close. | The extractor does not generate sufficient flow/vacuum (fan too slow) and the air pressure switch does not close; check the fan speed/power supply and the closing of the pressure switch by measuring the differential pressure and inspecting the exhaust duct. |
| C7 | The fan is not working. | Fault in the extractor (motor/RPM sensor/wiring) prevents its rotation or speed signal; check for 230 V supply and tachometric signal to the fan, continuity, and that the impeller rotates freely. |
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 Junkers 8716011707 extractor.
- Catalogue reference
- 8716011707
- Brand
- Junkers
- Type of part
- Extractor fans
- Units in stock
- 5 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Frequently asked questions about the extractor 8716011707
Does this flue extractor work for a boiler ZWN24-7MFA23?
When should this extractor be replaced in a ZWN24-7MFA23?
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