The HVAC control unit in my 98 Honda Accord without climate control quit working. The blower motor responds to the control, but the temperature control, vent positions, defrost, AC, etc. do not work. I replaced the unit and the replacement worked for almost a year and then it quit. I replaced it again and the replacement worked one time and quit. I checked and there is power to the unit and the ground checks out good. It could be the unit itself, but that does not seem likely after the repeated occurrance. Has anyone else had this problem or have any ideas for anything else to check?