Chamberlain 4200C doesnt open or close properly
I just changed the gears on a chamberlain 4200C.
but now the door doesnt open fully and the trolley travels to far back,which causes the bar to bend
Ive tried the travel adjustment screws, but doesnt seem to work?
is this a sensor problem ?
but now the door doesnt open fully and the trolley travels to far back,which causes the bar to bend
Ive tried the travel adjustment screws, but doesnt seem to work?
is this a sensor problem ?
Home Security - liftmaster - Liftmaster, Chamberlain, Sears Door Bracket
Answers & Comments
You did not sync the chain correctly. If you have not touched the travel limits, take chain off sprocket and run door to either up or down position. Put chain back on with trolley in up or down, accordingly. Tension and make final travel adjustments.