Btridle

Anybody have any advice on the direction I should go? I have a Clearwater Spa that I just inherited from a cabin I bought. The third pump on the tub was badly rusted and when pushed the button to fire it up a snowflake looking icon appears on the controls. I ordered a new pump and installed it, plugging it into the same slot on the circuit board as the old pump. When I fire pump one and two they work well but the icon looks different (swirly thing). The new pump however will not fire and the icon appears to be for a blower motor (snowflake). When I look at the wiring diagram the slot I plugged the new pump into says its for an optional third pump not a blower. I also switched the new pump to one of the other pumps terminals to check if the new pump worked and it fired run up. Just looking for a little advice on where look before I call a tech. Was hoping it was something simple that I'm just not seeing. Circuit board is a BC2003. Any help is greatly appreciated.