I have a cruisair cockpit bait freezer in my 43' ocean. In consists of a unit in the engine room plumbed to a freezer box in the cockpit with two cold plates and a temp sensor in it. It is AC powered and is air cooled and does not appear to rely on any raw water feed. I would tell you more about it but that's really all I know and can't seem to find much in the way of reference on-line. It has always worked up until last week. Now it runs as normal but the plates do not get cold. There is a simple display/control panel in the ER that shows temp, and temp set at but nothing else. No error messages or codes that are obvious. I have called my refrig tech to come take a look but he's backed up a bit. Any thoughts on any troubleshooting I could try?