Use the opener’s own contact-reversal and photo-eye tests. These are separate checks; neither is a complete inspection of the door and its hardware.
Tools and materials
- Exact opener manual
- The test obstruction specified by that manual
- Clear view of the doorway and access to the control
- Record of the last test and service
Time is a planning estimate. It excludes professional repairs, drying and replacement parts unless specified.
Step-by-step checks
1. Identify the model and prerequisites
Find the opener model and current manual. Read the test instructions before moving the door. If the door hangs unevenly, hardware looks damaged or travel is already abnormal, book service rather than starting repeated test cycles.
2. Make the test area safe
Clear the full travel path and keep everyone out of the doorway. Position yourself where you can operate the control and see the door. Prepare the manufacturer-specified object for the contact test; do not substitute an object of guessed height.
3. Complete both prescribed checks
Perform the contact-obstruction and photo-eye checks separately in the manual’s order. Record pass or fail for each, rather than one combined tick. A reversing contact test does not establish that the separate photo-eye circuit works.
4. Act on a failure
Stop automatic use if either system fails and arrange service. Do not defeat sensors, raise closing force or adjust springs to obtain a pass. Repeat the prescribed tests after a technician completes relevant adjustments.
Check the result
Both required tests must behave as the model instructions describe. A homeowner checklist is not a regulatory compliance certificate.
What can happen if you postpone it?
A failed protective system can leave someone exposed to a closing door. This is a safety repair; do not use a cost comparison to justify continued operation.
When to call a professional
Call a garage-door service professional for failed tests, damaged hardware, a heavy or uneven door, or any uncertainty about safe manual operation.
Keep a useful record
Write down the model, date, observations and next action. Save a photograph only from a safe position. Keep service invoices with your household records so the next check has a clear comparison.
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Sources and scope
Sources checked November 5, 2026. AI-assisted educational writing; no field test or licensed professional review is claimed. Model instructions and local requirements take priority.