Vaillant Pressure Gauge VMW ES 28 362 5 R3 Ref. 101271

Vaillant boilers compatible with reference 101271

Pressure gauge with reference 101271. 21 verified compatibilities: VMW 24/282-5 R2 and VMW 24/282-5 R1.

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. 101271 is the part for your boiler

What determines it is not the boiler model, but the reference printed on the part you already have installed.

1. Find the reference printed on the installed part and check whether it matches the catalogue reference 101271. 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 and faults that the pressure gauge 101271 resolves.

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 doesn't move; it always stays at the same point no matter what I do with the installation.

  Cause: The internal spring of the pressure gauge gets stuck due to rust or accumulated scale and stops responding to pressure changes.

  Bleed a radiator or briefly open the filling valve and see if the needle reacts; if it doesn't move at all, the pressure gauge is suspect.

• 02

  It indicates a pressure that doesn't match what the rest of the boiler says, for example, the low pressure fault triggers and the pressure gauge shows it's fine.

  Cause: The mechanism loses calibration over time, and the reading deviates even though it continues to operate normally.

  If the boiler has a digital pressure reading, compare it with the gauge before replacing it.

• 03

  There is water dripping from the back, either from the fitting or the capillary that goes to the circuit.

  Cause: The fitting gasket or the capillary itself degrades with the cycles of heat and pressure and starts to leak.

  Dry the area thoroughly and tighten the fitting without forcing it; if the leak reappears in minutes, it's not just a matter of tightening.

• 04

  The needle is stuck right at the red mark of 3 bar, even though you have bled and lowered the pressure.

  Cause: It is common for it to get stuck at the stop if dirt or limescale has entered the mechanism after a temporary overpressure.

  Gently tap the sphere with your finger, without applying force, and check if the needle drops; if it doesn't, the blockage is internal.

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.

Vaillant 101271 pressure gauge datasheet

Catalogue reference

101271

Brand

Vaillant

Type of part

Pressure gauges & aquastats

Units in stock

3 units

Status

Refurbished

Warranty

1 year

Shipping

Delivery time shown at checkout

Return

14 days

Data read on the part and in the manufacturer's documentation

What we have not been able to verify does not appear here.

Pressure gauge

0-3 bar, green zone approx. 0-1.8 bar, red mark at 3 bar

Manuals and technical documentation

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

• Vaillant VKC I 322/1-3 Manual (PDF)Document © Vaillant, provided as a technical reference.