Unusual noise -- Loud and strange noises might mean that the system requires a substitute fan or condensate pump, or one more part. https://vs5ixm4Qklpawzpoibtuvavdlph3llmebsv5rkcyl2v62opakmea.webpkgcache.com/doc/-/s/Lhcathome.Cern.ch%2Flhcathome%2Fshow_user.php%3Fuserid%3D1035441