Two car garage opener (Liftmaster 3500D) has been in (light) use for four years. Vehicles are sedan and mid-size pickup. Has always worked OK with sedan on both sides of garage; has always hesitated ever so slightly with truck on both sides of garage but more so on the right (facing door from outside)side. Please note that ALL other functions work perfectly and quickly with BOTH vehicles in ALL locations.Lately the operation when signaled from the truck has taken 'spells' (sedan continues to work OK); opens door for a week or so and then door will not open and has to be 'coaxed' by repeated 'requests'; eventually the door opens (so far). Please note--and I apologize for repeating this--that ALL other functions work OK from the truck in ALL locations with NO 'spells' of not working.
It boils down to this: Prompt entrance to garage by truck is unreliable.
We, and two "experts", have tried everything to no avail. By the way, LM 'phone/on line help has been useless; they don't even seem to "get" the problem.
Any suggestions?
It boils down to this: Prompt entrance to garage by truck is unreliable.
We, and two "experts", have tried everything to no avail. By the way, LM 'phone/on line help has been useless; they don't even seem to "get" the problem.
Any suggestions?
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