Rob I just went through something similar. I ended up flushing the Evap (?) cooling on each unit. I couldn't believe the growth and restrictive flow I was getting prior to flushing each unit seperately. Next step was to install new remote temp sensors at the return side if the AC units and program the fan run times and staggering the compressor timer so no compressor would kick in at the same time on initial start uip. Then I cleaned and replaced the filters and cleaned and vacuumed everwhere I could reach on the units. One strange thing that can happen with Cruisaire and Marine Airr units is a flakey RJ45 connector from the remote controls (in my case) the digital "Elite" control to the control AC unit's main control board can cause this issue. I removed, the telco type plugs and they were sprayed with contact cleaner and the plugs were cleaned with a pencil eraser. Now the AC units are actually working better then when they were installed. I always thought the remote temp probes were a joke but in my salon unit it made a huge difference in the way the unit works and stopped what I would call short cycling resulting in the unit running less and cooling more, no more HPF codes or the lack of cooling on really hot days with really high water temps we have seen in SNJ this year. Don't forget the common stuff like the raw water circulation pump, the strainer and restrictions from build up in the AC units input and discharge hoses. I ran a few gallons of vinegar as well and I have been trying a handfull of Bromine tablets in the strainer basket. Yesterday I had the boat hauled for a good bottom cleaning and to find out why my transom lights seemed like they had lost thier brillent Blue light. The lights were covered with slime from the Algee vaused by an daily average water temperature of almost 90 degrees for the last month or longer.
Bill
