There are 2 fuses on the main PC board, one 12V, one 120V. Do you have 120VAC at the receptacle where the frig is plugged in? It is on a breaker in the main panel.
If the pressure-test (manomometer- water column) did not detect a gas leak, go rent a combustible gas "sniffer", trace every line, then check every gas appliance's regulator.
BryantRV.com has downloadable owners,installation, and service manuals for most RV appliances.
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2000 Winnebago Ultimate Freedom USQ40JD
, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA.
" My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy