Performed furnace and AC diagnostic on 2003 system. Upon my diagnostic I found that the AC was operational although had a weak capacitor. And then proceeded on my furnace diagnostic and found out he secondary motor control for the fan had gone out due to the fan over amping. Further investigation show that pulling the blower wheel from the compartment I found that the motor had leaked oil and was covered in debris. Recommended blower wheel cleaning and motor replacement. System is fully operational upon departure heating and cooling and customer has signed up with maintenance plan for two times a year