4-2
Easy Fix
LiftMaster · Garage Door Openers
Safety system reported inconsistent sensor state during close cycle.
Quick Answer
Error code 4-2 on your LiftMaster Garage Door Openers means: Safety system reported inconsistent sensor state during close cycle.. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Tighten sensor brackets and verify alignment.
2
Inspect wire continuity at terminals.
3
Re-route wires away from high-interference sources.
4
Replace suspect sensor pair if fault is intermittent.
5
Retest multiple close cycles.
Pro Tip
This is a common issue that most users can resolve without specialized tools. Try the first step before moving on to more complex solutions.
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