Lancer ES 2003 Hot/Cold knob won't turn. Snaps back to where it previously was. Mechanic said would be very expensive to replace all cables and doors opening and closing air ducts. I'm wanting to try and fix this myself. Is there a schematic of the cables, pulleys and doors for the heat/AC system? I can't find a repair manual for this car. Mechanic is able to manually switch the doors/vents over to either AC or Heater. I want to know how he manually was able to move the heat/cold knob by moving the actual cables and doors. I don't want to continually pay him every spring and fall to switch the car back from heat to AC. I definitely don't have enough money ~ $700 to replace all cables/pulleys/doors.

actually, you don't have to remove the center console, radio or anything to change temps... I was told the same thing and even had the cables replaced for it to do the exact same thing... If you get down on the driver floor board and look under the dash, against the side of the middle console under the radio, you will see the cable... If you turn the knob to hot or cold, whichever you want and push or pull the cable at the same time, it will allow you to change it... I've been doing this with my 2003 Lancer for 3 years now... kinda stupid, but less expensive!! actually, you don't have to remove the center console, radio or anything to change temps... I was told the same thing and even had the cables replaced for it to do the exact same thing... If you get down on the driver floor board and look under the dash, against the side of the middle console under the radio, you will see the cable... If you turn the knob to hot or cold, whichever you want and push or pull the cable at the same time, it will allow you to change it... I've been doing this with my 2003 Lancer for 3 years now... kinda stupid, but less expensive!!