Pressure Gauge Ariston Basic 23 MFFI Boiler

Compatible Ariston boilers

Manometer. Seven confirmed compatibilities: 23 M and 23 MFFI.

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 it 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 —. If it is not visible, do not identify the part by 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 on the manometer

The manometer shows the pressure of the boiler circuit. These are the typical symptoms and what to do:

Common symptoms and faults

• 01

  The needle of the manometer always stays stuck at the same number, even though the actual pressure in the circuit rises or falls.

  Cause: The internal mechanism of the pressure gauge has seized up and does not respond to changes in pressure.

  Bleed a radiator and observe if the needle moves even slightly; if it doesn't react to a real pressure change, the pressure gauge is the one failing, not the circuit.

• 02

  The glass is broken or fogged on the inside, making it difficult to clearly see the needle or the pressure or temperature scales.

  Cause: Over time, moisture can get in or the glass can crack due to impact or heat, and the dial becomes unreadable even though the mechanism works.

  Check if the problem is just visibility by cleaning the outside; if the moisture is inside the glass, no cleaning will fix it, and the part needs to be replaced.

• 03

  The pressure gauge shows a reading that doesn't match what's expected, for example, it remains at zero after filling the circuit.

  Cause: The internal pressure intake of the manometer may be blocked by lime or air, or the mechanism itself has lost calibration.

  Repeat the filling and bleeding of the circuit slowly; if other signals from the boiler indicate that there is pressure and it starts without locking, the reading fault is with the pressure gauge.

• 04

  The needle moves, but it does so abruptly or in jumps instead of rising and falling smoothly with the pressure.

  Cause: The internal mechanism has friction that causes the needle to move in jerks instead of moving continuously.

  Gently tap the glass while observing the needle: if it frees up with the tap, confirm an internal mechanical fault before replacing the part.

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.

Ariston pressure gauge datasheet

Uniclima internal SKU

MAACU23MFFI

Brand

Ariston

Type of part

Pressure gauges & aquastats

Units in stock

6 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.

Temperature range

40-120 °C

Temperature scale

0 to 120 °C

Pressure gauge

0 to 4 bar