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Hi, Main blower on my furnace has stopped in 2-3 minutes and never come back. I inspected the furnace and found it starts normally (frame, main blower, another motor on top of furnase...etc.) initial time but main blower stopped after 2 -3 minutes even though frame (fire) is on. Frame went out 1-2 minutes after main blower stopped. Frame is continuing to on and off but main blower never starts again except first time. First time means shut down the main switch, wait 5 minutes and bring it back on. Main switch down---wait 5 minutes---main switch on---furnace starts normally (frame, main blower, motor on top of furnace)---main blower stopped in 2 minutes(fire is still on and top motor is running)---frame(fire) stopped(top motor still on)---frame(fire) turn on with top motor but no main blower---frame(fire) is continue to on and off and top motor is continue to run but main blower is continue to down. What I did so far, Cleaned air filter. Cleaned main blower motor housing & inside of furnase. Replaced capacitor (7.5 uf 370v)