My cruiseair unit will sometimes run for a few hours and sometimes only runs for a few minutes and cuts off with the High Pressure warning. I know the High Pressure reason for cut off is often lack of water flow however water flow is normal. The fact it sometimes runs for some hours before shutting down would indicate it is receiving adequate water. I am thinking it could be the trigger circuit that turns on the compressor and water pump ? When it cuts off with the High Pressure warning I turn it back on and it will then run normally for a while before cutting off eventually. Any ideas what I can try ?