Having problems and thought I'd ask for some help. The cooling fan shut off and wasn't coming on when hot so I took a look through everything and found the fuse was blown. Replaced it with the extra 20 amp fuse and still not working tried a different 20 amp fuse and still no joy. The new fuses were not blown so there is no short anywhere. Could the relay or temperature switch failing cause the fuse to blow as a symptom of a bigger problem?