[Misdirection]

Disconnect the line going to the AC unit and then try the pump to see if anything comes out. And try blowing air thru the AC unit.

One time on my old boat, I must have gotten some type of vapor lock in my AC unit. Pump would come on but no water came out. I ended up having to disconnect the input hoses and output hoses from the AC unit and let any residual water drain. My thought was I had water, air, then more water in the line and that was somehow locking it up.

Let us know how you make out.

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