LiftMaster L991S appears in manufacturer material for particular opener families. The family listing below is a useful starting point, but it does not confirm your exact opener model or an Amazon listing.
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What the manufacturer actually lists
The one-button layout makes L991S a simple current white-family option. Its narrow official listing matters more than its compact controls: do not carry it over to a yellow, purple or green LEARN button.
| Opener family or evidence | Status | Published claim |
|---|---|---|
| White round LEARN button · Security+ 3.0 | manufacturer listed for family | LiftMaster official source lists L991S for chamberlain-white-round Learn button |
Evidence boundary
The documented L991S connections are product-to-family records. No exact opener-model-to-accessory pair is confirmed in this source set, so check the motor-unit label and linked manual.
Battery and replacement checks
A battery type for L991S has not been verified in this source data. Use its official manual and the marking inside your own transmitter before ordering a replacement cell.
Before you choose L991S
- Compare the full LiftMaster accessory code with the label on the device being replaced.
- Read the opener motor-unit model and identify its button shape or named protocol.
- Use the L991S source links below to check model revisions and exceptions.
Individual Amazon listing not verified
We have not checked an Amazon ASIN, seller or variation for L991S. Use the official manufacturer information below while comparing search results.
Evidence status: Manufacturer family listing · exact opener unverified. Reviewed: 2026-11-04.
Model-specific Amazon searches
The manufacturer identifies LiftMaster L991S for the system described above. This is an exact-SKU Amazon search; seller, variant, stock and fit for your opener have not been checked.
- (paid link) Search LiftMaster L991S on Amazon
These links open Amazon search results, not a verified individual listing. Compare the exact manufacturer model and your opener manual before buying.
Official sources and review scope
These links support the claims on this page. Check your exact model and the manufacturer's latest revision before buying or programming.
- LiftMaster remotes/keypads learn-button compatibility support.chamberlaingroup.com · checked 2026-11-04 · Current model lists by white/yellow/purple/red-orange/green LEARN button
- LiftMaster compatibility tool support.chamberlaingroup.com · checked 2026-11-04 · L991S,L993S,L932M,L993M,L992U,L979S,L979M,L979U and button-color scopes