76 300D Heater Blower Motor Not Working
I found the changeover from a/c to heat problem in my 76 300D was the vacuum switch was not working so I reversed the vacuum lines on the vacuum motor and it switched from a/c to heat. (not really a repair but a quick way to get heat in a cold car) This worked fine for about 3 weeks. Then the blower motor fuse blew. I replaced it with the correct 8 amp fuse and it worked another week. After the replacement fuse blew I put in a 16 amp fuse. (not smart, but I was cold) The blower seemed to work fine, but quit a few hours later.