[Mrmerlin]

Please read this it will familiarize you with the HVAC system before you spend any more money

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&sqi=2&ved=0CEsQFjAA&url=http%3A%2F%2Fwww.928gt.com%2FT-WallyHVAC.aspx&ei=tNNxUdPTDs_vqQG94YCAAg&usg=AFQjCNELPje_Z70T6sJEBQqPzEyL0qCDLA&bvm=bv.45512109,d.aWM&cad=rja