3j sanjo fridge issues

[Coot]

Hi guys. I have a sanjo fridge in my camper. Was working great until we turned it off for winter.
Now it’s back on it doesn’t seem to get cold. Lights are on when door is open, it’s on the coldest setting & blue light above power button is on. Any ideas would be appreciated

 

[roadtripper]

Welcome to the forum

I've edited the thread title a little to maybe attract more responses.

How is the voltage on the battery the fridge is connected to?

Compressor fridges are rather notoriously sensitive to battery voltage and health as the first second or so of the compressor starting is nearly a dead short and it can draw a big current spike and the voltage drops.

If the compressor doesn't start reasonably quickly the controller may lock out to prevent damage. That can usually be reset by disconnecting the fridge from power - usually at the fuse as the off switch in the fridge doesn't always fully power down it's more of a soft off like a television.