This may be a duplicate post. Submitted 11/19/18 but it did not appear. I have a Marine Air 16,000 BTU A/C unit with reverse cycle heat on my '95 Mariner 330. At the beginning of the '18 season it ran fine, after not being used for the previous 10 years. Mid season it started to turn off the cooling, and displays a CLF error code on the control panel. Seems intermittent. The heating works just fine. The manual for the unit defines this code as "no compressor load fault". The manual goes on to say " A CLF occurs when the compressor has been on for 1/2 second and no current is flowing in the compressor circuit, such as when the head pressure switch is open. This fault is cleared the next time the compressor tries to turn on and no other faults exist." What does this mean in regular guy talk? Could it be from low water flow? There is a filter with two wing nuts holding the top down. I cleaned that out. The metal filter in there was real muddy, so I am thinking maybe the hose on either side of the filter could still have some residue. But again, the heat works fine. Maybe the heat takes less water flow to operate? Anyway, no info in manual to tell me how to prevent or remedy the situation. Any A/C techs out there that can break this down for me? Any help from anybody is appreciated.