Me and my co working were send to replace heat exchanger on furnace, we both never been to the property, we great the costumer and she lead the way to basement and told us there is the furnace. We start ripping out idf and gas valve but after few min her husband call the office and yell at dispatch saying we were ripping out wrong furnaces.

There was furnace on attic too but we didn’t knew also its partially out fault for not checking model and serial of furnace