If you have actually seen rattling, banging or squealing audios after that it might be your old cooling device is at fault. https://cm35lap2uosg7fi6x7zaj3gb67wd3a7k5hcna7mgca7qz6va54bq.cdn.ampproject.org/c/www.Webwiki.it%2Fbelsizeparkhvac.co.uk%2Fair-conditioning-installation.html/