We have an 82 Carrier AC unit and it just quit in the house. It is running outside but won't kick on in the house. We aren't sure how to tell if it is the relay or the blower motor. How do we test these to see if they are bad?

I just posted a similar question... This is my forth fix in two weeks... it could be the blower or the relay.. I've replaced them both and not sure what my next move is...