Filling Key for Boiler FE-20E - Ref. 77823800
If you notice that you cannot fill the heating circuit or that there is a water leak causing an increase in pressure, a technical diagnosis must confirm if you need the filling key for boiler FE-20E. This part allows you to replenish water to the heating circuit, ensuring it maintains the proper pressure. It is installed in models such as Ecocompact FE 20-E and Ecocompact FE 20E/2 N, among others. If you observe these symptoms, it is time to replace the filling key.
- Type of part
- Filling valves
- Status
- Refurbished
- Catalogue reference
- 77823800
- Warranty
- 1 year
Fagor boilers compatible with reference 77823800
Filling key with reference 77823800. Three confirmed compatibilities: Ecocompact FE 20-E and Ecocompact FE 20E/2 N.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Fagor Ecocompact FE 20-E | Fagor | Contrasted |
| Fagor Ecocompact FE 20E/2 N | Fagor | Contrasted |
| Fagor Ecocompact FE 20E 1N | Fagor | 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. 77823800 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 77823800. 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 filling valve 77823800
The filling valve allows water to refill the heating circuit. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
You need to frequently top up the installation, even if you don't see any leaks.
Cause: The valve does not close properly and allows water to pass through slowly.
Close the valve properly and monitor the pressure gauge for a couple of hours to see if the pressure continues to drop.
- 02
There is moisture around the red control knob of the valve.
Cause: The o-ring or the stem seal has worn out over time.
Dry the area and tighten the pressure switch of the control before replacing the complete valve.
- 03
Do you have difficulty turning the knob or does it get stuck when trying to refill?
Cause: Limescale builds up in the internal mechanism and hinders rotation.
Move the control gently and check if the water in the area is very hard before forcing it.
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.
Fiche of the filling key Fagor 77823800
- Catalogue reference
- 77823800
- Uniclima internal SKU
- LLEFE20E
- Brand
- Fagor
- Type of part
- Filling valves
- Units in stock
- 2 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Frequently asked questions about the filling key 77823800
Does this filling key work for a Ecocompact FE 20-E boiler?
Which models are compatible with the filling key LLEFE20E?
What color is the filling key remote for boiler FE-20E?
Is the reference 77823800 engraved on the filling key?
Are there documented fault codes for the filling valve LLEFE20E?
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