Any Honda mechanics hang out here? Anyway.... I have a 1999 Honda Accord EX... with the manual heater / AC controls. My switch to control the fan speed only works on one speed and I can feel that the switch has "slack" in it so its my assumption that the heater control unit needs to be replaced? I believe Honda calls this item the heater control unit... while other manufactures may call it the A/C control head. Is it basically a direct swap out to change one of these, it anyone knows. I'm talking about the control unit in the dash that operates the heater / ac fan speed and the temp. Thanks, Elbert