Installer installed wrong furnace
Our furnace installer said he was going to put in a Goodman GMH950703BXA, but actually he put in a Goodman GKS90453BXAE. The former is the 95% efficiency model with higher capacity. Installation was completed a day ago.
I realize we should have checked the model number before he put it in our attic, but I was busy at work at the time...
The damn things look identical according to the brochure, so you would never know (except wondering why it took longer to heat your house) that a switch had been made, unless you took the front panel off and checked the model number, which I did.
What would you do if you were in my shoes?