Balance and Safety-Reverse Test: the full procedure
The mandatory verification that the door is balanced and the opener's auto-reverse and photo-eye entrapment protection work before leaving the job.
- Applies to: All field technicians
- Frequency: End of every install, spring, or opener job
- Scope: Covers the door-balance check and the CPSC/UL 325 entrapment-protection tests (photo-eye and reversing-force). Any adjustment to springs, cables, or opener force settings to correct a failed test defers to the manufacturer's instructions and a trained technician.
What you need
- 2-inch test block (or 1.5 in+ object)
- Tape measure
- Manufacturer manual
- Work order / checklist
- Ladder
The procedure, step by step
- Disconnect the opener for the balance check — Pull the manual release per the manufacturer's instructions so the door moves freely, then test balance by hand.
- Check door balance — Raise the door halfway and release. A balanced door stays roughly in place. If it falls or flies up, the spring system needs adjustment - defer that adjustment to the manufacturer's instructions and a trained technician.
- Reconnect the opener — Re-engage the trolley per the manufacturer's instructions and confirm the door cycles smoothly under power.
- Test the photo-eye entrapment system — With the door closing, break the infrared beam with an object taller than 6 inches. The door must stop and reverse. If it does not, the sensor setup defers to the manufacturer's instructions and a trained technician.
- Run the reversing-force (2-inch block) test — Place a 2-inch block (or 1.5 in+ object) flat on the floor in the door's path and close the door. Per CPSC, it must reverse within 2 seconds of contact. A failure means the force is wrong - defer adjustment to the manufacturer and a trained technician.
- Confirm both entrapment systems independently — UL 325 requires two independent systems. Verify both the contact-reverse (force) and non-contact (photo-eye) systems work on their own.
- Document the test results — Record pass/fail for balance, photo-eye, and 2-inch block tests on the work order with the date and tech name.
- Do not leave a failed safety test — If any safety test fails and cannot be corrected within the manufacturer's parameters by a trained technician, the door is tagged unsafe and the customer is informed before you leave.
Quality check before you finish
- Balance checked with opener disconnected
- Door holds position at halfway (balanced) or imbalance deferred to a trained tech
- Photo-eye reverses door when beam broken above 6 inches
- 2-inch block test reverses door within 2 seconds (CPSC)
- Both entrapment systems verified independently (UL 325)
- All three tests documented with date and tech name
- No job left with a failed, uncorrected safety test
This is a free, source-anchored standard operating procedure (SOP) you can print and hand to staff. It documents the work sequence for a Garage Doors business — not safety or regulatory rulings, which defer to the cited authorities, the applicable code, and your own health-and-safety plan. Open the tool above to print it, toggle ink-saver, or (with a free ToolFluency Business account) edit it to match your own workflow.
Sources
- CPSC (cpsc.gov)
- UL (ul.com)
- DASMA (dasma.com)
About Free Garage Door Safety-Reverse Test SOP
Free printable SOP for the garage door balance and auto-reverse test — photo-eye check and CPSC 2-inch block test. Force adjustment defers to a trained tech.
How to use
- Read the full procedure top to bottom before the work — the SOP runs in order and each step builds on the last.
- Toggle Ink-saver (black & white) for a cheaper mono print for the binder; leave it off for the full-color version.
- Click Print SOP to print or save as PDF. Print one per crew, laminate it for the binder, or attach it to the job in your scheduling system.
- Train new hires on it and have staff sign off. Found something out of date? Use the feedback link — flagged SOPs are re-researched against the source list.
Frequently asked questions
What is the 2-inch block test?
It is the federal CPSC reversing-force test: you place a 2-inch-high block flat on the floor in the door’s path and close the door, which must reverse within 2 seconds of striking it (16 CFR part 1211). It verifies the opener’s contact-reverse entrapment system. If the door fails, the force setting is wrong and the adjustment defers to the manufacturer’s instructions and a trained technician.
What do I do if the door fails the balance check?
A door that falls or springs upward when released at halfway is out of balance, which points to the spring system. Correcting it requires adjusting spring tension — a task that defers entirely to the manufacturer’s instructions and a trained garage door technician because of the extreme stored force. Never adjust spring tension to pass a balance test without the proper training and tools.
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