Little one warm... Big one cold and sweating if I am. Fast hit and run its workin REALLY JUST KIDDIN But it works to some extent , most of my no cooling call are just office people Remember we live in 68 to 72 degrees. Some like it 68 some 72 ... Ever deal with office women ? Especially the one under the diffuser? although nothing to do with thread ( sorry venting ) . Cooper temp probe is the one I use. And gauges also unless hit and run