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Garage Door Issue: how to troubleshoot when Up Arrow Flashes 4 & Down Arrow Flashes 6 times on LiftMaster
1. Clear all obstruction b/w sensors
2. Align both sensors correctly if LED color is not steadily glowing
3. Elevate sensors a bit up in location
Keyword: Recovery Sensors, Alignment, Obstruction
Manual link: embed.widencdn.net/pdf/plus/cg...
See page: 6 for configuration, 29 - Reversing Sensor Definition, #24 LED Color Check, #37 Diagnostic Code