Many homeowners do searches online to look for specific support with their Chamberlain garage door openers. Companies like mine only sell Liftmaster Professional garage door openers. We do not sell or offer support for these retail models. Why you might ask? This is because we have do not keep records on Chamberlain retail models. We do not keep records of Chamberlain Model numbers in our office. Although many of these openers have compatible parts to the Professional Models, we do not have the information in our system to properly cross reference these models and their higher equivalents in the Liftmaster Professional line.  Below, you will find the Chamberlain Technical Support Phone Number and their hours of operation.