Vetilation doesn't work in positions 1,2,3, works only in position 4..
You have got a defective blower motor resistor. Your blower resistor is located just to the left of your blower motor (which is located under the passenger side of your dash. You may find you have a carpeted covered piece of cardboard that is located on the underside of the dash (below the glove box ) if so you'll have to to remove it by removing the retaining clips, Now look up behind the glove box and you"ll see the blower motor and just to the left of it there is rectangular unit with a connector with six wires within the connector , the colors of the wires will be as follows (black and orange)(black and yellow)(two wire's that are black and white)(black and blue)and (black). the blower motor resistor is totally bypassed when you turn your fan speed to high ! The blower speed is controlled by the ground side of the blower. When you request any of the other three speeds the ground circuit is routed through the blower resistor which is made up of three resistors.( resistors reduce the current flow) and each resistor reduces a predetermined about of current.So when you request medium high blower speed the ground circuit runs through one resistor, if you request medium low the ground circuit runs through two resistors , and through three resistors to obtain low blower speed, Normally what happens is the blower resistor blows out the circuit between the fan switch and the blower motor resistor which results in the lost of all lower speeds,no different then the wire to the blower motor just being disconnected.Replace the blower motor resistor and you will in great shape .Thanks for using fixya
Jan 04, 2011 |
2000 Ford Focus