inducer motor running backwards

[lbarnes63]

While helping a friend replace the main fan motor of his gas furnace, I noticed that the inducer fan was turning the wrong direction. The unit had been operating like this for approx 6 years. we switched the wires, and the fan ran in the correct direction (verified by checking the airflow at the flue). what are the issues with this condition? was it pushing the exhaust into the house? are their efficiency issues? how could it have operated all this time with that condition?
thanks!

[Java_Bob]

interesting, were has the condensation been going??

[lbarnes63]

As I understand it, only the 90% efficiency furnaces have the condensate issue. This is a less efficient model, so the only condensate is when the unit is operating as an air conditioner. This problem is when the unit is heating.

[Java_Bob]

must have been enough air movement to keep it from going into flame rollout, i guess.