Beginning of the season A/C was running fine, but only half a week maybe. Had a good stream going out the thru hull. AC was running on shorepower, then came back to dock and had HI PS message days later. The lock had released debris. I tried fishing debris each direction from the strainer, didnt retrieve anything. But the strainer was half full maybe. I've re-primed it (I believe) by putting a running water hose in strainer and running bilge pump w seacock closed. And then by running boat on water with seacock open. Water coming out of thru hull is still barely a stream like the first time I had HI PS, like slowly pouring a glass of water. System runs and makes cold air. It probably only runs a hour then says HI PS again. I tightened hose clamps, checked strainer and air filter on AC unit. What is this about mud doblets or something I found somewhere on Google? How can I use a multimeter to test the ac water pump? How can I force water or flush the system after the ac water pump? TIA I've tried all the advice I could find on YouTube.