Name each opening consistently
Use left and right as viewed from a stated position, or another unambiguous label. List the opener model for each bay and which handheld, keypad or vehicle control operates it. Do not put private PINs in the map. Different openers can share a brand name while using incompatible accessories or programming procedures.
Separate incorrect assignment from poor reception
A button opening the wrong bay suggests a different issue from a button that works only near the receiver. Chamberlain Group’s programming guidance directs users to model compatibility information, including separate support for built-in vehicle controls. Describe the observed response before clearing memory; a reset can remove other working devices and leave the household without its expected entrance.
Agree on the desired handover
After an authorized repair or programming change, ask for each intended control-to-door assignment to be checked with the openings clear. Retain the product instructions and mark spare remotes in a way that does not expose access codes. If only one operator was replaced, record the accessories that changed instead of assuming both bays now use the same equipment.
Your questions
Can one remote operate different opener brands?
Only where the specific remote supports the relevant systems. Check the actual compatibility list rather than the number of buttons.
Should I erase both openers when one button fails?
Not without a reason. Identify the affected control path and use the appropriate instructions so functioning access is not unnecessarily removed.