Refrigeration - E-Z Kold

[campbdon]

Hi, I've had a EZ-KOLD 12A model in my boat for 15 yrs, installed by the PO. It's worked beautifully all these years until now. When I turn it on the fan/pump works for 25sec then some quiet beeps start (from where I cannot tell) and then restarts over. This happens over and over again. The periodicity of this is quite exact. Normally after an hour or 2 the cold bar would be getting cold but not anymore. I've tried setting the thermostat from off to full on and everything in between. The thin temp sensor rod seems like it's inserted into the bar as it should. I can't find any troubleshooting online for this model. Anyone have any ideas for me?
Thanks
DonC

[pcmm]

From memory, I think they used a standard danfoss type compressor. You can hook up an LED to them to get the error codes out.