Vaillant Boiler Thermometer Pressure Gauge Temperature VCW 15 3 T3 WDH Ref. 101002

Vaillant boilers compatible with reference 101002

Pressure gauge with reference 101002. Six confirmed compatibilities: VC and VC8.

Verified 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. 101002 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 101002. 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 on the manometer 101002

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 does not move or stays fixed at a certain value, without following the operation of the boiler.

  Cause: The capillary and the remote bulb form a sealed circuit; if the mechanism gets stuck or the capillary is damaged, the needle stops moving with temperature changes.

  First, check that the remote bulb is properly placed in its measuring sleeve and has not moved before replacing the thermometer.

• 02

  The capillary is bent, broken, or there is a visible liquid leak at some point along the path.

  Cause: It is a thin and poorly protected tube, easy to damage when handling the boiler or when passing near other components.

  Follow the complete path of the capillary from the sphere to the bulb: a bend without leakage can sometimes be corrected without replacing the part.

• 03

  The gauge shows no reading, the needle seems to be off the printed scale.

  Cause: If the mechanism loses internal fluid or gets stuck, the needle may remain outside the normal range of the scale instead of indicating the minimum.

  Note the exact point where the needle stops and compare it with the actual temperature of the circuit: if it never moves from there regardless of what happens in the boiler, the mechanism is faulty.

• 04

  The needle reacts very slowly or with a delay regarding the temperature changes of the boiler.

  Cause: Over time, the internal fluid of the capillary loses some of its responsiveness, especially if it has previously undergone any bending.

  Compare the response time when starting the boiler cold: if it takes several extra minutes to start moving, it is advisable to check the capillary before considering the thermometer to be good.

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 101002 pressure gauge datasheet

Catalogue reference

101002

Uniclima internal SKU

MTVCW15T3

Brand

Vaillant

Type of part

Pressure gauges & aquastats

Units in stock

7 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.

Printed scale on the dial

Numbered 30-60-90-120-150; needle stopped near 20-30