morning everyone, yesterday had my furnance cleaned. tech told me that i needed new fan and motor for the power vent. i told him that i had that replaced last year, went into house found repair bill from aug. 2009 showed him. He called office told me that it was under warranty for a year, told him that the statement was from aug. then he told me thati needed a whole new unit, $800.00. Should i be looking for a new oil company??? and a different estimate. Can i purchase this cheaper from a supply house. thanks everyone.