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why does my evaporative cooler leak water at night but not in the daytime? Answered

at night water runs off my roof when the cooler is on low but it does not do it during the day.


In addition to daytime evaporation, you could be hitting the dewpoint at night, compounding the issue.


8 years ago

I bet the hose joint that is leaking expands and plugs the gap in the daytime, and contracts and leaves a gap at night.

I would hazard a guess and say that it doesn't do it during the day because it's evaporating.