Improper Slope: Insufficient slope or inappropriate installation of the condensate drain line can impede drainage and bring on drinking water accumulation. Clem states: I've a mitshubishi split air conditioner with two returns. A single develops a brownish oily residue over the airflow blades. What could possibly be causes this to https://air-conditioning-repair87531.wikimeglio.com/9808514/not_known_factual_statements_about_mini_split_repair