# Where to Buy a Genuine Vaillant Cooling Plug

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Updated: 2026-10-20
Language: en-GB

Where to buy the Vaillant cooling plug (0020266328 or 0020269259), what to check before you order, and how eBay’s Money Back Guarantee covers your purchase.

Where to buy a genuine Vaillant cooling plug, and what to check first.

- Either part number works: 0020269259 (boxed) or 0020266328 (Vaillant bag).
- Look for Vaillant packaging with part number and barcode; new and unused.
- Check the seller’s feedback and read feedback for the same item.
- Listed for aroTHERM Plus VWL 35/6 to 125/6; check other models first.
- Both are sold on eBay by seller boarder895 (100% positive, since 2003).

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