# Vaillant 0020269259: The Coding Plug, Cooling Function

URL: https://www.vheatc.site/vaillant-0020269259
Canonical-URL: https://www.vheatc.site/vaillant-0020269259
Updated: 2026-10-20
Language: en-GB

Vaillant 0020269259 is the boxed “Coding plug, cooling function”: what it does, which heat pumps it suits, and the identical plug that costs less.

Vaillant 0020269259 is the coding plug Vaillant labels "Coding plug, cooling
function". It unlocks cooling on aroTHERM Plus heat pumps supplied without it.

- Supplied new in the original Vaillant box.
- Listed for aroTHERM Plus VWL 35/6, 55/6, 75/6, 105/6, 125/6.
- An installer still enables cooling in the installer menu.
- The same plug is sold as 0020266328 in a Vaillant bag, for a fraction of the price.

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