{"pageUrl":"https://www.vheatc.site/vaillant-cooling-option-not-showing","title":"Vaillant Cooling Option Not Showing? What to Check","lastModified":"2026-10-20","claims":[{"id":"plug-unlocks-option","statement":"On a Vaillant aroTHERM Plus supplied without cooling, the cooling option stays unavailable until the cooling coding plug is fitted.","source":"eBay listing descriptions by seller boarder895; Vaillant installer documentation","hash":"sha256:387b3fe8799bd75b73f2af89117c521064c5ab3f56ec7887f80b02ba644452a7"},{"id":"cooling-technology-setting","statement":"Owners report a \"cooling technology\" setting on the heat pump controller that had to be changed from \"no cooling\" to \"active cooling\" before cooling ran.","source":"Owner reports in the OpenEnergyMonitor community thread \"Vaillant AroTherm plus cooling?\" (community.openenergymonitor.org/t/vaillant-arotherm-plus-cooling/26658), 2024–2025","hash":"sha256:4cfdef55be38a0a41519c1e374b423c45d035703b40adc96d40687e94f620a80"},{"id":"esco-setting","statement":"One owner found an ESCO (energy supply company) setting set to \"Cooling off\" was preventing cooling from running.","source":"Owner reports in the OpenEnergyMonitor community thread \"Vaillant AroTherm plus cooling?\" (community.openenergymonitor.org/t/vaillant-arotherm-plus-cooling/26658), 2024–2025","hash":"sha256:8771bb392dc3c7ba5f80b0eb7f0b52ec1eb347419128e3418cc903096fea8314"},{"id":"test-mode-report","statement":"One owner reports that, with the plug fitted, cooling ran only in the controller's cooling test mode (reported as P11) and the system returned to standby afterwards.","source":"Owner reports in the OpenEnergyMonitor community thread \"Vaillant AroTherm plus cooling?\" (community.openenergymonitor.org/t/vaillant-arotherm-plus-cooling/26658), 2024–2025","hash":"sha256:b07116b96873cfe1fb86871502e1c1f4d033a2e8b479b3275385fabe682ee531"}]}