LiftMaster MA011 Magnet for Mega Arm Barrier Gate Operators
The LiftMaster MA011 is a replacement magnet for select Mega Arm barrier gate operator systems. Although it is a small component, it can play an important role in how the operator tracks movement, limit position, or internal switching depending on the specific assembly. A missing or damaged magnet can cause troubleshooting confusion because the operator may look mechanically complete while the sensing point is no longer reliable. In many cases, technicians replace MA011 after the magnet has broken loose, been damaged during service, or been lost when another bracket or cover part was removed.
Because the magnet works with nearby sensing hardware or a matching bracket location, placement matters. Do not install it in a guessed location or swap it with an unrelated magnet from another operator. Confirm the original part location in the Mega Arm parts diagram and inspect the mating switch or sensor before assuming the magnet is the only failed part.
Compatible With
- LiftMaster Mega Arm barrier gate operators using the MA011 magnet
- Various LiftMaster Mega Arm / commercial barrier gate operator assemblies when called out by the replacement parts diagram
- MADCBB / MATDCBB / MASDCBB / MASTDCBB style systems only where the diagram confirms MA011
- Commercial barrier gate position or sensing assemblies using the matching LiftMaster magnet
Features & Specifications
| Manufacturer | LiftMaster |
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| Product Type | Magnet |
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| Part Number | MA011 |
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| Application | Mega Arm barrier gate operator sensing / reference assembly |
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| Compatible Operator Type | Commercial barrier gate operator |
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| Notes | Small magnet component; location must match original assembly |
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Also Known As / Related Part Numbers
- MA011
- MA-011
- LM-MA011
- LiftMaster Mega Arm magnet
- LiftMaster barrier gate magnet
Technician Note
If a magnet is missing or loose, inspect the sensor, switch, bracket, wiring, and mounting surface. Replacing the magnet alone may not correct the issue if the sensor was knocked out of alignment or damaged.
Before Ordering Checklist
- Confirm the original part number is MA011
- Locate the magnet position in the parts diagram before removal or installation
- Inspect the mating sensor or switch for damage
- Check for loose brackets or missing fasteners
- Do not glue or relocate the magnet unless the manufacturer instructions support that repair
Professional Advisory
For position-sensing problems or repeated limit faults, a qualified gate technician should diagnose the full sensor and wiring circuit rather than replacing parts at random.
Important Ordering Warnings
- Do not substitute a generic magnet without confirming size, strength, mounting position, and sensor relationship
- Do not bypass a sensor or limit device to make the operator run
Product Questions & Answers
What is MA011 used for?
MA011 is a replacement magnet used in select LiftMaster Mega Arm barrier gate operator assemblies.
Can a missing magnet stop the operator from working correctly?
Yes. If the magnet is part of a sensing or position reference system, a missing or misaligned magnet can cause operating problems.
Does MA011 fit every LiftMaster barrier operator?
No. It should be used only where the parts diagram lists MA011 or the original part matches.
Should I replace the sensor too?
Only if the sensor or switch is damaged, misaligned, or fails testing. Inspect both parts during service.
Can I install the magnet in a different position?
No. The magnet should be installed in the original manufacturer location so the matching sensor can read it correctly.
