1. That RV park man is NOT a tech. Even a low skilled parts changer knows to ALWAYS check the DC voltage at an appliance.
2. A Control board CANNOT change the incoming LINE(AC) voltage, so that just shows that the Park Parts Changer does not know anything
3. IF you have 2- 6 volt batteries and the VOLTAGE at the refer is 6 volts, and you have 12 volts thru out the RV, That means you have just 1 wire at one of those 2 batteries that is ONLY connected to the Pos of the one 6 volt battery. That wire is going to the refer or maybe other appliances. Check your batteries and you should not have a SINGLE only wire to just one post on one of the batteries.
4. It usually takes a MINIMUM of 9 volts to activate the LP Gas valve on the refer, so it is amazing you had the refer working on LP at all
5. Have you changed the batteries or messed with them lately? That would be the reason you had a miswired battery. Doug
