Who replaced the
batteries and did this problem start after the batteries were replaced? If so look to be sure there was not a ground or other cable left off. Are the new batteries 12 volt each or 6 volt?
I had an incident one time where a fuse was blown and would work sometimes and after much current usage it would open; after cooling off it would make contact. Recheck the 12 volt distribution panel and you might just want to replace the main fuses and see what happens. The other possibility could be a bad ground for the non functioning circuits.
Thanks RV Wizard..., after further troubleshooting I found the problem, just don't know what to do next. The fuse for the fridge/galley keeps blowing(all others are fine). Is it from overload or a bad ground? I replaced the batteries in November and recently topped off before driving 1800 miles and used them with and without shore power. Since I don't know much about the electrical systems, should I just take it in for service or is there something obvious I should try first? Appreciate all advice!!