Hey Patty,
If your Everchill Refrigerator # 324-000119 freezer section isn't staying cold and fluctuates in temperature then the only troubleshooting you'll be able to do is:
1. Check the power and ground at the unit. You should have the ground ran directly to the chassis of the trailer and should see 12 volts when checking the power with a multimeter # PT89ZR.
2. The drain line could be clogged or frozen over. You'll need to unplug the unit, open the doors, and let it thaw out.
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