Quote:
Originally Posted by Dana1963
It’s to clean out drain line add a little bleach this helps dissolve and clean out crud. The drain line should be exposed by your A/C unit outside
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I just had my first A/C yearly maintenance (new house) done by Munn's and he told me to use very hot water once a month and no vinegar or bleach (which I had heard from others). I leave a funnel out there and then slowly pour a gallon of hot water from the tap. That's it.