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Question About Chamberlain Garage Door Opener HD400DM
Automobile Installed Remote Control...

For about 6 weeks after a technician installed the Garage Door Opener, the permanently installed automobile opener worked OK. Now, only the Hand-Held opener control will operate the Garage Door Opener. Request help & a Manual. Thank You: L. Barrett

Asked by Lawrence on 12/20/2008 0  Answer

ManualsOnline posted an answer 15 years, 9 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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