I just had the same problem. I called the 800 # they asked for proof of purchase to replace if 1 year old. I did not have it so...... I took it apart ------ unpluged ! Only to find all gears are fine, service dept. said gears cause this problem, not so with mine. Remove top by pulling of base remove 6 screws on under side, played with the switch inside a bit and, it now works, do not know how long but for know it does. My opinion is the relay gets dirty, and you cannot clean it without talking whole thing apart.