offdahook wrote:
The AC won't run for me more than an hour. Yesterday I turned it on, it was 84 degrees in the the cabin. I had it on for an hour, and it went up to 85 degrees first before it came back down to 84. I had minimal water flow out of the port side.
You're not cooling at all, then. Maybe your seawater pump lost prime, then for lack of cooling the compressor high-head-pressure switch disabled the compressor. Is the compressor running? Do you have a pump priming procedure? Do you know where the compressor Reset is?
Mine (a Mermaid 6500) is installed with a manual ball valve on a Tee just downstream of the pump that allows the pump to dump into the bilge to prime it (the pump needs to be below the water line). Once primed, the pump should normally remain primed unless you lift the boat.
Mine is in a lift, so I used to need to open the engine compartment hatch to get at the priming ball valve every time I put it in the water and wanted to run the A/C. I've since added a freshwater circuit so I can prime the pump remotely with a push of a button; a very handy solution to a headache.
Tom