What could cause the air conditioner to not cool effectively?

LG LB-H0850QC Air Conditioner · Updated 2026-04-04

Possible causes include a dirty air filter, an incorrect temperature setting, or blocked air inlet or outlet vents on the indoor unit. The room may also have been very hot when the unit was first turned on, so allow time for it to cool down.

Source: LB-H0850QC Air Conditioner Manual, Page 15

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