Mine keeps comming on in heavy green milo. Isnt there a sensor on the roof of the walker house that sets this off or is there also one on the front crank of the walkers??? I had the walker belt off replacing a fan bearing and thought i had it plenty tight. Does it need to be "fiddle string" tight? I know its getting bogged down because whenver it goes off i stop and it takes it a good bit to clean out, so theres not a problem with the harnes/sensor. Never have had this problem before.