in my honda accord 97 i seem to be having a problem with the fan . the car is turn off, and the light is still on, i can turn on the fan anytime i want, is it something wrong with the sensor. i turn the knob to any number and the fan still blows air out even when the car is turn off, and when i press any off those button it lightens, even the ac button, but the ac doesnt turn on but the button light does?? what should i do?? thanks