The contractor that installed my 2.5 ton split system used the incorrect evap. fan blower. On low speed it is pushing out approx. 1400 cfm. According to the maufacture, this unit should be at 1050 cfm. My question is can I either replace the fan speed circuit controller with another one or can I put an inductor in series with the motor to limit the current to slow it down or do you recommend replacing the the whole blower?