LiftMaster Garage Door Error Code 16: How to Fix It

Easy 10 minutes Low Severity Verified June 2026
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Error Code
16
Brand
LiftMaster
Product Type
garage_door
Severity
Low
DIY Difficulty
Easy
Estimated Fix Time
10 minutes
LiftMaster error code 16 indicates that the battery backup system is low or failing. This usually happens when the backup battery cannot hold a charge, often after a power outage. While your garage door opener will still work using household power, the battery needs attention to ensure it opens during an outage.
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Tools You'll Need

How to Fix Error Code 16

  1. Unplug the Garage Door Opener

    Always unplug the unit to avoid electric shock.

  2. Locate the Battery Backup

  3. Disconnect the Battery

    Do not pull on the wires; pull the connector only.

  4. Remove the Old Battery

    Batteries contain chemicals; do not dispose of in regular trash.

  5. Install the New Battery

    Use only the correct replacement battery specified for your LiftMaster model.

  6. Plug the Opener Back In and Test

Parts You May Need

LiftMaster Backup Battery (e.g., 475LM)
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LiftMaster Backup Battery (e.g., 475LM)
Check Price on Amazon
LiftMaster Backup Battery (e.g., 475LM)
Check Price on Amazon
LiftMaster Backup Battery (e.g., 475LM)
Check Price on Amazon
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When to Call a Professional

If replacing the battery does not clear error code 16, the circuit board may be faulty. Contact a professional garage door technician for further diagnosis.

Frequently Asked Questions

Why is my LiftMaster showing error code 16 after a power outage?
Error code 16 indicates the backup battery is low. A power outage can drain the battery, or the battery may be old and unable to hold a charge. Replace the battery to fix the issue.
Can I still open my garage door with error code 16?
Yes, as long as household power is available. The backup battery is only needed during a power outage. You can continue using the opener normally until the battery is replaced.
How often should I replace the LiftMaster backup battery?
LiftMaster recommends replacing the backup battery every 1-2 years, depending on usage and environmental conditions. Regular testing (e.g., pressing the test button) can help monitor battery health.
What kind of battery does my LiftMaster opener use?
Most LiftMaster models with battery backup use a 12V sealed lead-acid battery (e.g., LiftMaster 475LM). Check your owner's manual for the specific part number.
Error code 16 returns after replacing battery. What now?
If the error persists, the battery connector or circuit board may be damaged. Inspect the connector for corrosion or loose wires. If everything looks fine, consult a professional technician.

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