When my DW and I bought our one year old Jayco Seneca, the refer quit cooling like it should have been. Even tho it was still under warranty, I decided to replace it with a large Amana. It took some serious work but we finally got the Dometic out and the Amana in.
I installed two extra batteries, two solar panels (250 watts ea) and an inverter (solely for the refer). The refer is super cold even when we are boondocking in an asphalt parking lot at some horse show. It was 104 degrees outside yesterday and the Amana worked just fine.
I also installed two small 120v fans behind the Amana to exhaust any heat built up.
Happy Travels.....Lew
