problem somewhere with my climate control unit. the fuse for the fan blower in the car has blown twice in the last two weeks (25 amp). i replaced it the first time with another 25 amp and it lasted a week or so. today, the fan would only blow weakly and it didn't change from position 1 to 4 on the dial?? turned on the a/c and it popped. i put in a 20 amp, as it was the only one i had handy and it popped as soon as i turned the fan on. should i try a 30 amp? how far up would you go in amperage? i know this isn't a good idea..obviously the ccu is drawing too much power for some reason. any ideas why??