We bought a used 2020 Keystone Cougar 368MBI in 2020. It was practically new. In Aug 2022, we had the refrigerator replaced under manufacturer warranty because it would not stay cold. Now, 1/2023, the refrigerator is out again and would not stay cold. We called Dometic and they said the refrigerator is no longer under warranty because it has passed the 2 year warranty even though we just got a new fridge less than 5 months ago. We can’t figure why it is not staying cold. Does anyone have this issue with their Dometic refrigerator or know what could be the problem? We have model RM1350SLM. ~Jason