# What Does the Vaillant Cooling Plug Look Like?

URL: https://www.vheatc.site/what-does-the-vaillant-cooling-plug-look-like
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Updated: 2026-10-20
Language: en-GB

How to recognise the Vaillant cooling plug — a small blue plug on a white two-pin connector — how its two packs differ, and how to tell if one is fitted.

The Vaillant cooling plug is a blue plug on a white two-pin connector.

- 0020269259: Vaillant box, labelled "Coding plug, cooling function".
- 0020266328: Vaillant small-parts bag, labelled with the part number only.
- Both packs contain the same plug.
- Checking whether one is fitted is an installer job (power isolated).

Buy on eBay (seller boarder895) — the same plug in two packs:
- 0020266328 (Vaillant small-parts bag, labelled with the part number): https://www.vheatc.site/go/ebay/0020266328
- 0020269259 (Original Vaillant box, labelled “Coding plug, cooling function”): https://www.vheatc.site/go/ebay/0020269259