Vaillant 0020136629 EcoTEC Pro Display (Post 2012)

The Vaillant 0020136629 is a display unit supplied by Vaillant as a spare for its heating appliances. It is catalogued as a printed circuit board item, which reflects the fact that the display is an electronic assembly rather than a simple mechanical part. Its role in the appliance is to present operating information to the user and to the engineer working on the unit, so that settings, status and fault indications can be read directly from the front of the appliance.

• The display is blank or unlit while the appliance continues to run.
• Characters are missing, garbled or only partly visible across the screen.
• Fault codes do not appear, or cannot be read when the appliance locks out.
• The screen flickers intermittently, or fades as the appliance warms up.
• The display responds erratically, or not at all, when the appliance controls are operated.

• Read the part number printed on the existing display and match it against 0020136629 before purchase.
• Check the appliance model and serial details on the data plate so the correct variant is identified.
• If any seal or gasket is disturbed while gaining access to the display, order a replacement at the same time.
• Electrical work inside the appliance should be carried out by a competent person, with the appliance isolated from the supply first.