I am not sure if this is a full timer issue or what kind of rig or frig needed this stuff. We have always had no problems with our frigs in 6 trailers. We stay in Florida for 5 months and travel all over the US. On hot,hot days we make the frig cooler and on cold days we raise it up. We do this pretty much weekly. The only thing we do other than use it is to defrost it every now and then. I use insulin and it requires cool temps , never had a problem in all our years. The only thing that ever went bad was a thermister in a unit a few years ago.
Happy trails