Garage Doors decision guide
Reviewed and updated September 24, 2026
Test automatic reversal using the exact opener instructions, and only when the door is otherwise sound. The contact-reversal test and the photo-eye test check different functions. DASMA’s homeowner guide uses a 2-by-4 laid flat under the door’s center for the contact test and expects the door to reverse on contact. It also calls for a separate check of the photo-eye protection.
Check the exact opener manual, test only a sound system with the opening clear, and stop automatic use if either required protective function fails.
Use the exact opener instructions and test only when the door is otherwise sound. Do not use a reversal test to investigate uncontrolled movement, visible damage, a loaded lock, or another unsafe condition. Keep people, pets, vehicles, and loose objects outside the door's path before any normal-condition test.
The contact-reversal test and photo-eye test check different functions. DASMA's homeowner guide describes placing a 2-by-4 flat beneath the center for the contact test and separately checking photo-eye protection. Follow the dimensions, sequence, and reset instructions for the exact opener rather than treating this summary as the product manual.
If the door does not reverse as the exact instructions require, stop using automatic operation and keep the opening clear. Do not increase force or bypass a protective device to make the test pass. Record which test failed, the opener model, and the observed response for manufacturer support or trained service.
Notice next: Use the completed record to request the exact review described below.
Prepare a factual record before asking for a product-specific or property-specific decision.
The record narrows the decision; it does not prove a diagnosis, approval, price, or scope.
No. They check different protective functions and both need exact instructions.
No. Reversal testing is for an otherwise sound door with a clear path.
Stop automatic operation and record the model, test, and observed response.
This decision guide does not inspect or approve the installed product or service.
Current product instructions, provider terms, property rules, and local requirements still control.
A ZIP code does not prove compatibility, jurisdiction, price, availability, or job acceptance.
The summary does not replace the exact opener's test instructions.
This page does not inspect the installed system or make a remote diagnosis.
No local result, price, provider availability, offer, phone, or routing claim is made.