My girlfriend has a 2002 4-runner "Limited". The controls for the heater are becoming unresponsive. You sometimes have to push a control many times, or hold it down for many seconds to get the function to operate. She has been told by the dealer that this problem requires a new circuit board, which costs $1300 (plus labor?). It seems to me that this is likely a switch problem, or something else which I could fix myself. Does anyone have any experience with repairing this problem?
Bob