Giannoni 3-Way Valve for Fagor Boiler FE-20E-2N
Refurbished Fagor 3-way valves Giannoni

Giannoni 3-Way Valve for Fagor Boiler FE-20E-2N

Three-way valve with Giannoni group, installed in Fagor mixed boilers from the FE/FEE range indicated. It directs the flow of water between heating and domestic hot water. Giannoni is the actual manufacturer of the component; Fagor is the brand of the boiler where it is installed. The part does not have a reference code, setting, pressure, or voltage engraved on it. The replacement requires first confirming the fault of the part through technical diagnosis, even when it is stuck or loses tightness.

Type of part
3-way valves
Status
Refurbished
Catalogue reference
MU1020100
Warranty
1 year
VAT included OUT OF STOCK
Compatibility

Fagor boilers compatible with reference MU1020100

Three-way valve with reference MU1020100. Four confirmed compatibilities: FE 20E/2N and FE 20E/2B.

Proven compatibility

Boiler modelFamilyVerification
Fagor FE 20E/2NFagor Eco Compact FE 20E / FEE 20Contrasted
Fagor FE 20E/2BFagor Eco Compact FE 20E / FEE 20Contrasted
Fagor FEE 20-2NFagor Eco Compact FE 20E / FEE 20Contrasted
Fagor FEE 20-2BFagor Eco Compact FE 20E / FEE 20Contrasted

Can't see your model or have questions? The printed reference takes precedence. How to check it ·

Guide

How to check if the part number MU1020100 is the one for your boiler.

The part reference, model, and equipment revision must be verified against the manufacturer's documentation.

  1. Find the reference printed on the installed part and check whether it matches the catalogue reference MU1020100. If it is not visible, do not identify the part from its shape alone.
  2. Check the full boiler model on its data plate and look for it in the model associations on this page.
  3. Compare the connections and physical body with the original part before installation.
  4. If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.
Diagnosis and fault codes

Symptoms that require diagnosis in the 3-way valve MU1020100

The 3-way valve diverts water between heating and domestic hot water. These are the typical symptoms and what to do:

Common symptoms and faults

  • 01

    The boiler does not heat domestic hot water but does heat, or vice versa.

    Cause: The valve shutter gets stuck and does not allow the corresponding circuit to flow.

    Look, if access allows, that the valve stem moves freely and is not stuck.

  • 02

    Sudden changes in water temperature when opening a tap

    Cause: The valve does not completely close the heating flow when it should prioritize the domestic hot water.

    Open and close the tap several times in a row and observe if the fault is constant or only appears intermittently; this helps determine if it is the gas valve or the sensor.

  • 03

    Water leaks from the body of the gas valve.

    Cause: The Giannoni group loses tightness in the internal joints with years of use.

    Check if the leak occurs only when the boiler is running or also when it is at rest, to narrow down whether it is the gas valve or the expansion vessel.

  • 04

    The valve gets stuck after a long period of not using the boiler.

    Cause: The internal mechanism gets stuck due to lack of movement and the limescale in the water.

    Try a forced start cycle in domestic hot water and heating before purchasing the part; sometimes it self-releases when moved.

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.

Technical data

Data sheet for the Fagor 3-way valve MU1020100

Catalogue reference
MU1020100
Uniclima internal SKU
V3VFECFE2N
Brand
Fagor
Type of part
3-way valves
Units in stock
0 units
Status
Refurbished
Warranty
1 year
Shipping
Delivery time shown at checkout
Return
14 days

Part data and available documentation

Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.

Engraved manufacturer
GIANNONI
Before purchasing
  • The component is Giannoni; it is not a part manufactured by Fagor, although it is installed in Fagor boilers.
Frequently Asked Questions

Frequently asked questions about the 3-way valve MU1020100

Is this Giannoni 3-way valve suitable for my Fagor FE-20EF-2N?
Yes, the Fagor FE-20EF-2N is among the models listed as compatible with this gas valve.
Who actually manufactures this gas valve, Fagor or Giannoni?
Giannoni manufactures the gas valve assembly; Fagor is the brand of the boiler where it is installed, not the manufacturer of the component.
What fault indicates that this gas valve needs to be replaced in a Fagor FE-28E?
It should be checked when the gas valve becomes stuck or loses tightness, cutting off the flow between heating and domestic hot water. Replacement requires a technical diagnosis.
Does this valve also work for the Fagor FE-20EIN-2N?
Yes, the FE-20EIN-2N is on the list of models compatible with this Giannoni valve.
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1-year warranty reviewed and tested
14-day return uninstalled parts
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Giannoni 3-Way Valve for Fagor Boiler FE-20E-2N