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Question About Chamberlain Garage Door Opener HD400DM
Adjustment/chain...

when chain adjusted according to manual, the door can only be opened & closed automaticlly but cannot be opened manually. I cannot leave it like that, because if we have a power failure; we will not have the car out. Please, if you have a solution let me know. Robert

Asked by Pat Warr on 04/27/2010 0  Answer

ManualsOnline posted an answer 14 years, 5 months ago

The ManualsOnline team has found the manual for this product! We hope it helps solve your problem. Get the Manual Here

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