What Lamp Does Not Light (Filter Alarm Timing) Means
A lamp that doesn't light immediately after you turn the unit's power off is not a fault - LG's dedicated article explains the green and orange lamps specifically indicate filter-cleaning timing: the filter alarm lamp automatically lights about 2,400 hours after the unit first started, stays lit even after you turn the power off, and automatically extinguishes about 50 hours later.
Common Causes of Lamp Does Not Light (Filter Alarm Timing)
- Filter-cleaning alarm timer running its normal course (up to ~2,400 hours of operation before lighting, ~50 hours after that before extinguishing)
🔧 One Safe Check You Can Try
If you want to clear the filter alarm immediately rather than waiting the roughly 50 hours, press Cancel Reservation or Set/Release three times in short succession on the remote control, or use the filter condition checking/resetting option in the Set menu on a cable remote.
⚠ Why You Shouldn't Go Further Than That
- There's no hardware fault here - this is a scheduled reminder system working as designed, not a lamp malfunction.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.