Why Does My LiftMaster MyQ Show Obstruction When the Door Path Is Clear

Problem Description

Your LiftMaster myQ app reports obstruction and blocks remote closing even though the garage doorway is clear. The door may close from wall control but fail from app for safety reasons. This is typically caused by sensor misalignment, sunlight interference, dirty lenses, wiring voltage drops, or travel force settings triggering false safety checks.

Symptoms

• myQ app reports obstruction with clear path
• Remote close blocked but wall control works
• Safety sensor lights look unstable or dim
• Door reverses near floor without object
• Issue appears more in bright sunlight
• Obstruction alerts happen intermittently

Recognize these? Here's what usually causes it.

Common Causes

• Photo-eye sensors slightly misaligned
• Sunlight saturates receiving sensor
• Lens dirt scatters infrared beam
• Low sensor voltage from wiring damage
• Travel force too sensitive near close
• Track resistance interpreted as obstruction

Tools & Requirements

Step-by-Step Solution

1

Validate Sensor Indicator Lights

Check both photo-eye sensor LEDs at the bottom of the door tracks. You should see stable indicator behavior, not flicker. If one light is weak or intermittent, alignment or wiring is likely the cause. Small angle shifts can break beam integrity and trigger obstruction errors in myQ remote-close logic.

2

Clean and Re-align Sensors

Wipe each sensor lens with a soft dry cloth and then adjust both brackets until indicator lights remain steady. Even dust or cobweb film can scatter the infrared beam. Tighten mounting hardware after alignment so vibration from door movement does not knock sensors out of position again.

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3

Check Sunlight and Reflection Effects

If errors happen during certain times of day, direct sun may be saturating the receiving sensor. Temporarily shade the sensor and retest remote close behavior. Add a small glare shield or adjust sensor angle slightly to reduce direct sunlight exposure while maintaining proper beam alignment.

4

Inspect Wiring and Track Resistance

Examine low-voltage wires for nicks, loose terminals, or staple damage along the opener path. Then manually move the door to detect binding points in tracks or rollers. Mechanical resistance near close can mimic obstruction behavior and trigger false reversals or blocked remote-closing events.

5

Recalibrate Force and Travel

Use LiftMaster setup controls to relearn travel limits and closing force according to manufacturer guidance. Overly sensitive force settings can stop the door early and report obstruction even without objects. After calibration, test closing from myQ app and ensure behavior remains consistent across multiple cycles.

Quick Solutions

Still having issues? This is usually the deeper cause below.

Need More Help? LiftMaster Support

Note: The contact information below connects you directly to LiftMaster's official customer support team, not Trunetto. They can help with warranty claims, device replacements, and advanced technical issues.