{"pageUrl":"https://www.vheatc.site/how-a-vaillant-cooling-resistor-is-fitted","title":"How a Vaillant cooling resistor is fitted","lastModified":"2026-05-22","claims":[{"id":"defined-position","statement":"The Vaillant cooling resistor plugs into a defined coding-plug position in the heat pump wiring, where the controller reads its resistance value.","source":"Vaillant installer documentation","hash":"sha256:7e0e53bc1830900a7b8a78e4d4bb6379bdd126427441e9f083de25e21525d869"},{"id":"fitting-then-enable","statement":"Fitting the cooling resistor authorises cooling but does not switch it on; an installer must still enable cooling in the installer menu.","source":"Vaillant installer documentation for aroTHERM cooling","hash":"sha256:78a916833c619e7ed127a318f0d902798165eb6ae0ed1909556a5ce9ab290369"},{"id":"interchangeable-parts","statement":"Vaillant cooling resistor parts 0020266328 and 0020269259 are functionally identical and interchangeable.","source":"Vaillant spare-parts references","hash":"sha256:de526a08a6537647b45b6c1bafff61e237d920c3ed1d15c0a7ee41d1fc2dab22"}]}