OK I live in a mobile home in Oklahoma its been 100 pluse here last couple weeks and I noticed the other day my unit way making a scretching sound everyonece in a while then today it was a long scretching that didn't stop so I felt the air vent and it was blowing hot air so turned the unit off... and also my unit has not really kicked off during the day this last week intell around dark... plz help me... thanks