Ok guys I need help. Goodman 115K furnace (GSM), brand new installation, dip switches 1 and 2 "ON" (high cool speed) from factory, Green LED flashing 10 (1000 CFM) The instalation manual says with both switches "ON" the motor should turn about 1900 RPM but the motor housing list it as only a 1075 RPM motor. I need 1800 CFM for 4.5 tons. This is a factory setup, supposed to be matched to the condenser and the A coil. Where do I go from here?