# Vaillant Cooling Plug for Installers: Which Pack to Carry

URL: https://www.vheatc.site/vaillant-cooling-plug-for-installers
Canonical-URL: https://www.vheatc.site/vaillant-cooling-plug-for-installers
Updated: 2026-10-20
Language: en-GB

For installers fitting cooling on aroTHERM Plus: the two part numbers of the Vaillant cooling plug, which pack suits which job, and what happens after fitting.

For installers: the Vaillant cooling coding plug comes as 0020266328 (bag)
and 0020269259 (boxed "Coding plug, cooling function") — the same plug.

- Carry the bagged 0020266328 as van stock; buy the box when paperwork names 0020269259.
- Listed for aroTHERM Plus VWL 35/6 to 125/6; check other models first.
- After fitting: enable cooling at installer level, set cooling technology,
  check the ESCO setting, set min flow / dew point, confirm the emitters.
- Both sold on eBay by boarder895; set the quantity for several units.

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