LiftMaster 373LM Remote

Your LiftMaster 373LM at a glance

Three independently assignable buttons; Security+ 315 MHz rolling code.

373LM battery & holder

One 3 V CR2032, positive side up.

Programming your 373LM

Setup depends on the exact receiver and hardware revision. These model notes do not establish a complete pairing sequence for your equipment.

Match both the remote and opener or external receiver. Keep the door or gate in sight and clear of people. Do not hold a LEARN button or erase memory unless the instructions for that exact equipment require it.

Compatibility & exclusions

Compatible Security+ 315 MHz products; garage openers use a purple Learn button.

Gate and accessory setup can depend on the receiver. No universal replacement recommendation is verified.

If your 373LM is not working

Checks for 373LM

• A dedicated light-control button requires a compatible multifunction wall control; that feature is unavailable through a universal receiver.

General troubleshooting checks.

• No response: check the marked battery type and polarity; note whether another authorized control works.
• Short range: note when the problem began and whether it changes by location. Do not alter receiver wiring.
• Damaged case or buttons: keep the model label; stop using exposed, wet or damaged electronics.

373LM repair, parts & replacement

No exact replacement or part mapping has been confirmed for this page. A similar-looking remote, matching frequency or familiar model family is not sufficient evidence of interchangeability.

Model guides

Use the model-specific notes on this page with the instructions for your opener or receiver. A documented receiver match does not establish compatibility with every opener.