The blower in my hvac trane unit in the attic won't come on. Its a Trane model 030a140b1 and I think its about 7 yrs old.. I removed the panel from the side and all the wiring looked to be good, the a/c portion was working, but the fan won't come on, even when I switch it to Fan On..... I pulled the breaker reached in, manually spun the fan, and then removed my hand and put the breaker back in. The fan started working for about 30-45 sec b4 shutting off again. Anyone able to help me out???