My refrigerator quit working on gas. I can't hear the ignitor anymore but hear the gas valve open up like it should. Definitely have 12 volts to the circuit board and the unit works fine on AC. Anyone ever have to replace the circuit board for this problem before? For all the troubleshooting I have done, I figure it HAS to be the board. I live in the boonies, no RV service center within 200 miles. Board replacement is $120, just want to be as sure as I can before I order it.