Describe the current equipment honestly
Mention recurring faults, missing controls and features that no longer meet your needs. Keeping an operator solely because it still responds may overlook a problem you already know about. Give the installer enough history to evaluate reuse alongside the new door specification.
Ask for the compatibility decision
Have the proposal explain whether the retained equipment is suitable for the selected assembly. If additional components or changes are needed, list them separately. This makes the true cost of reuse visible instead of comparing a bare new-door price with a complete replacement package.
Make the handover cover both systems
If the opener stays, confirm which controls remain and keep its original model information with the new door records. Ask the installer to explain the completed operating checks. A mixed-age installation benefits from clear documentation of what changed and what did not.
Your questions
Must an old opener always be replaced?
Age alone does not settle the decision. Condition, suitability and the owner’s requirements need to be assessed for the actual installation.
Can a stronger opener compensate for a poorly moving door?
That is not a sound repair plan. The door’s condition should be addressed directly rather than masked by choosing a different motor.