{"pageUrl":"https://www.vheatc.site/what-is-a-vaillant-cooling-resistor","title":"What is a Vaillant cooling resistor?","lastModified":"2026-05-22","claims":[{"id":"authorises-cooling","statement":"The Vaillant cooling resistor is a coding plug that authorises a compatible Vaillant heat pump to operate in cooling mode.","source":"Vaillant installer documentation for aroTHERM cooling","hash":"sha256:c242c3ea67e2322f1698a30d84d40438cfe55aa532bca4858986591c68d64fb0"},{"id":"two-numbers","statement":"Vaillant has supplied the cooling resistor under both part numbers 0020266328 and 0020269259.","source":"Vaillant spare-parts references","hash":"sha256:27841b67684d42fece05ff8d2503c626b2499dc4bca48ee28423bb00bd6af05e"}]}