I jump-started my mother's dead car today with my 1995 Accord EX, and the next time I drove my car, noticed the heat wasn't working. The entire Heater control panel in the car doesn't work at all - no light for the heat flows or fresh air/recirculate air button or anything. Also, my rear window defroster doesn't work.

I checked the fuses for both rear defrost and Heater Control unit. The Under-hood fuses were fine for both. The under-dash fuse for the Heater Control relay was blown, so I replaced that 7.5 amp fuse. When I started up the car, I saw the lights for the air flow and fresh/recirc. air buttons light up briefly, and within a second or two they went off. Immediately I pulled out that fuse and it was blown. I did this once more, and blew another brand new fuse.

Has anyone experienced this before? Is there something I'm overlooking? And why wouldn't the rear window defroster work if the fuse is OK for that?? I'm stumped! Any ideas???