Marlin AC Troubleshooting

athomp228

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Belmar, NJ
Model
Marlin
Hi All

05 Marlin - Troubleshooting air conditioner not blowing cold. I noticed the system was around 52 degrees when first turned on (68 in cabin) and eventually works its way to the 65 degree setpoint but will not switch to cooling mode. I adjusted the ambient temperature setting in the programming to +10 degrees (which is the max) over what the unit believes is ambient temperature. The self test kicks on the compressor and blows cold air but I cannot get the unit to a setpoint that will turn the system into cooling mode in auto.

Is this just a bad temperature sensor? FYI, water flow is solid.
 
I'd try to get manufacturer assistance if you can.