For sure. We drove w/o AC for many summers in Florida in our ~1971 AMC Matador Station Wagon because the blower stopped working. My dad had checked the fuse and it looked fine, so he gave up as "too expensive to fix". Years later, a guy at work seeing him wet with sweat mentioned that the fuse might have melted from corrosion heat. Sure enough, the wire was melted inside right at the tip where you couldn't see it. He then installed a resettable breaker instead which the guy mentioned and we had AC. Today, we have free multimeters (Harbor Freight coupon) and web info like this to help. He could have tried swapping fuses, but perhaps Chemistry grads don't think of such things.
