When a Linear opener stops responding, note whether the wall station, remote and keypad behave differently. A model-specific light or beep pattern can be useful, but a code from another opener is not a reliable diagnosis. You do not need to run repeated cycles to collect information.
Record the existing indication
For example, Linear’s LDCO 841/863 manual separates door-operation indications from battery indications. Tell us which device produced the signal and when you noticed it. Leave covers closed and keep clear of the door while arranging a visit.
Preserve household access
A wall station can include functions beyond opening the door. Before a replacement is approved, list app users, remotes and keypad access that must be retained or changed. Keep account passwords private; the service discussion needs the equipment details and symptom, not your login.
Your questions, answered.
Are all Linear remotes interchangeable?
Do not choose by case appearance. We need the opener and remote model information to check the appropriate control family.
Should I factory-reset the opener before calling?
A reset can erase settings and access information. Describe the problem first and use only the procedure specified for your exact model when it is appropriate.