SIT 845 SIGMA Gas Valve for Fagor CE, FA, FE, and FEE - Code 0845061

Fagor boilers compatible with reference MU0809100

Gas valve with reference MU0809100. 12 verified compatibilities: FE-20E/2N and FE-20E/2B.

Proven compatibility

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. MU0809100 is the part 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 MU0809100. 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.

Symptoms that require diagnosis in the gas valve MU0809100

The gas valve regulates and modulates the gas flow to the burner. These are the typical symptoms and what to do:

Common symptoms and faults

• 01

  The boiler does not ignite: you can hear the click of the spark but there is no flame, or the flame goes out immediately.

  Cause: The solenoid valve EV1 of this valve does not open the gas flow to the burner, so there is no fuel even though there is a spark.

  Check that the ignition electrode is sparking and that the ionization cable is properly connected, to rule out an ignition fault before inspecting the gas valve.

• 02

  The flame fluctuates abruptly, as if the boiler cannot regulate the power.

  Cause: The MD modulator is not dosing the gas properly between ignition and normal operation, and the gas valve is allowing more or less gas than it should.

  Check that the modulator connector is properly fitted and free of oxidation before confirming the fault: a poor connection produces the same symptom.

• 03

  The boiler display shows a warning or lock related to the gas valve.

  Cause: The control unit detects that the EV1, EV2, or the modulator are not responding as they should and locks the boiler for safety.

  Note the exact code displayed before requesting the spare part: that code indicates which part is faulty and prevents changing the gas valve if the blockage comes from elsewhere.

• 04

  There is a slight smell of gas near the control panel or the gas valve itself.

  Cause: The solenoid valves of this type of valve can lose tightness with use and allow some gas to pass even when they are closed.

  Apply soapy water to the threaded connections of the inlet and outlet before suspecting the gas valve: a leak in a gasket does not require replacing it.

Fagor fault codes that require diagnosis

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 gas valve Fagor MU0809100

Catalogue reference

MU0809100

Uniclima internal SKU

VGFCE-20EN

Brand

Fagor

Type of part

Gas valves

Units in stock

3 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.

Manufacturer

SIT

Model / family

845 SIGMA

Inlet pressure (Pi max)

60 mbar

Outlet pressure (Po)

1-37 mbar

EV1 (1st solenoid valve)

230V~50Hz, 9.2 VA class B

EV2 (2nd solenoid valve/modulating)

230V~50Hz, 2.8 VA class J

Modulator MD, max. voltage.

17V DC

Maximum current

165 mA

Ambient temperature

0/60°C

Code (SIT)

0845061

Manufacturing (week/year)

0512

Batch

2507180

Nr

1191