How to open an electric gate in a power cut
Automatic swing and slide gates can be moved by hand when the power is out. Turn the power off, release the operator with its key or lever, and move the gate by hand. When power is back, re-engage the operator and restore power. If the release key is lost or the release will not work, call a gate company. Sources: Apollo, LiftMaster LA400DC owner's manual.
Steps
- Turn the power to the operator off.
- Use the release key or lever to disconnect the motor from the gate (LiftMaster LA400DC owner's manual).
- Move the gate by hand, slowly, and keep people and pets clear.
- When power is back: re-engage the operator, store the key somewhere you can find it, and restore power.
LiftMaster: "Always disconnect the batteries BEFORE servicing the operator." (LiftMaster RSL12V manual). Releasing the operator is fine; opening the control box is not. Never let children play with the gate or its controls (DASMA gate systems safety brochure (Nov 24).
Before the next outage
- Learn where the emergency stop is and how to turn power off and move the gate by hand (DASMA gate systems safety brochure (Nov 24).
- Keep the release key in a known place, not on the gate.
- For battery-backed openers, replace batteries on schedule: LiftMaster says every 3 years (LiftMaster RSL12V manual), Mighty Mule every 2 to 3 years (Mighty Mule gate opener maintenance guide).
When to call a gate company
- The release key is lost.
- The release will not disconnect the motor.
- The gate does not work after power returns and the operator is re-engaged.
Quick answers
Can I open my electric gate without power?
Yes. Apollo says all automatic swing and slide gates can be used by hand when the power is out, by releasing the operator.
How do I release my gate opener?
Turn the power off, then use the release key or lever on the operator. LiftMaster's LA400DC manual shows a key turn followed by a release lever turn.
What if I lost my gate release key?
Call a gate company. Do not force the gate or the operator.
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Related guides
Gate Repair USA is not a gate company. These guides are general information from the sources listed below. Stop at the safe checks: anything inside the control box, wiring, force or limit settings is a job for a gate technician. Costs are national ranges, not quotes.
Sources for this page
Last checked: November 2, 2026.