Filling Key Ariston Microtec T2 LLS 23 MFFI Ref. 996071
Refurbished Ariston Filling valves

Filling Key Ariston Microtec T2 LLS 23 MFFI Ref. 996071

Allow water to be replenished in the heating circuit to recover pressure. When it fails, the circuit cannot be refilled or it may leak and continuously let water through, causing an increase in pressure. This filling valve is compatible with Ariston boilers of the models Microtec 23 MFFI, Microtec 23 MI, Modula 23 MFFI, Modula 23 MI, T2 23 MFFI, T2 23 MI, among others. A technician must confirm through diagnosis whether it needs to be replaced when you observe water leaks or difficulties in maintaining system pressure.

Type of part
Filling valves
Status
Refurbished
Catalogue reference
996071
Warranty
1 year
VAT included OUT OF STOCK
Compatibility

Ariston boilers compatible with reference 996071

Filling key with reference 996071. 14 confirmed compatibilities: Microtec 23 MFFI and Microtec 23 MI.

Verified compatibility

Boiler modelFamilyVerification
Ariston Microtec 23 MFFIAristonVerified
Ariston Microtec 23 MIAristonVerified
Ariston Modula 23 MFFIAristonVerified
Ariston Modula 23 MIAristonVerified
Ariston T2 23 MFFIAristonVerified
Ariston T2 23 MIAristonVerified
Ariston Next 23 MFFIAristonVerified
Ariston Next 23 MIAristonVerified
Ariston One 23 MIAristonVerified
Ariston Tec IN 23 MFFIAristonVerified
Ariston Trend 24 MIAristonVerified
Ariston Uno 24 MFFIAristonVerified
Ariston Uno 24 MIAristonVerified
Ariston EST 23 MIAristonVerified

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 996071 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 996071. 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 filling valve 996071

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 refill the pressure in the heating circuit more often than usual.

    Cause: The filling valve does not close properly and allows internal dripping into the circuit.

    Close the valve completely and measure the pressure after a day; if it continues to drop without visible leaks, suspect the valve.

  • 02

    You see a moisture ring or a constant drop in the area of the brass nut.

    Cause: The internal gasket or the sealing seat of the valve has lost tightness over time.

    Carefully tighten the connection nut and dry the area to rule out that the leak is from a loose joint and not from the valve.

  • 03

    The key switch turns very stiffly or gets stuck in one position.

    Cause: The internal mechanism has seized up due to sediment or limescale, something common if the tap is not used frequently.

    Try to turn the knob gently; if it doesn't budge, avoid continuing to tighten it to prevent breaking the shaft before deciding on the replacement.

  • 04

    After manually filling the circuit, the pressure suddenly rises more than expected and then gradually decreases.

    Cause: A tap that doesn't close completely continues to let water from the mains pass through even if you think you have closed it.

    Check visually that the knob is in the fully closed position (the one marked as 'closed') and not halfway turned.

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 Ariston filling key 996071

Catalogue reference
996071
Uniclima internal SKU
LLT2LLS23
Brand
Ariston
Type of part
Filling valves
Units in stock
0 units
Status
Refurbished
Warranty
1 year
Shipping
Delivery time shown at checkout
Return
14 days
Documentation

Manuals and technical documentation

Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.

Frequently asked questions

Frequently asked questions about the filling key 996071

Does this filling key work for an Ariston T2/23 MFFI?
Yes, the T2/23 MFFI is on the list of compatible boilers along with Microtec, Modula, Next, Tec In, TX, and Uno.
When should the filling valve of the Ariston Uno 24 MFFI be replaced?
The technical diagnosis must confirm that it is necessary to replace it, even when it is leaking or does not close properly when pressure is restored in the circuit.

Spare parts related to Ariston Ariston

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Filling Key Ariston Microtec T2 LLS 23 MFFI Ref. 996071