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Hello and welcome to RVForums @johnrdds. I'm sorry to hear of the problem. My gut instinct question is, have you tried replacing the fuse and see if a new one holds? I'm not sure what a fridge control panel is. Where is this fuse located? In the coach's 12V panel in the coach or behind the cord reel?
Okay, then obviously something is shorting out and blowing the fuse. I suggest calling the dealer when they open and/or calling Newmar. Newmar is supposed to be 24/7 and the number is on the driver's side window but you'll likely get voicemail now. I have called Newmar on a Sunday when I had a critical issue and they helped so it's up to you when to call based on how critical the issue is to you.