Get in touch
Questions about the cooling plug?
Not sure which part number to choose, or whether the plug suits your heat pump? Ask me — I sell both on eBay and I’m happy to help before you buy.
Ask on eBay
Open either listing below and use Contact seller. eBay keeps the conversation alongside your order. Seller: boarder895. If you’re asking about compatibility, include your heat pump’s model code from the data plate.
Need it quickly, or delivered outside the UK?
Message me through eBay before you buy and something can be arranged. Say where the plug needs to go and by when, using “Contact seller” on either eBay listing. The standard postage options and prices are shown on each listing.
Already bought one?
Message me through eBay from your purchase history — that keeps everything with your order. Payment, postage and returns are handled by eBay under the terms shown on the listing.
Before you ask
You may find a faster answer in the cooling guides or the cooling upgrade pages, which cover what the plug does, which heat pumps use it, how cooling is activated, and why 0020266328 and 0020269259 are the same plug.
Buy the Vaillant cooling plug on eBay
Same blue plug, two packs. Choose the boxed 0020269259, or get the identical 0020266328 for a fraction of the price.
Original Vaillant box, labelled “Coding plug, cooling function”
Buy on eBaySold by eBay seller boarder895 · 100% positive feedback · 600+ feedback · on eBay since 2003 · 20+ plugs sold