The refrig has its own manual gas shutoff valve, so if the refrig continues to fail, you might look for that. But I don't think the water heater has a manual valve, so no magic answer there.
When you switch on the water heater at the sink apron, the red "Trying to Light" light should come on immediately. This doesn't depend on gas pressure or gas presence or pilot flame or anything else. The fact that it doesn't come on suggests to me that there may be no 12-volt DC power reaching the device. You might start by checking the 12vdc fuse feeding the water heater. The fuses are the little colored plastic things in the converter, not the big black things (circuit breakers).
I don't know the level of your trouble-shooting skills, but if the fuses are good, there is a diagram of the water heater control panel in the owner's manual (either in your blue binder or available on line). You might try to confirm the presence of 12-volt DC power.
Bill
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