This range hood was installed in my 2019 fifth wheel camper. Have had trouble with lights several times, since purchase of camper. RV dealer has fixed, by replacing  parts, twice, not finding cause of problem, so still have problem. Found 18 volts at quick disconnect for led lights, should be 12volts. Replaced circuit board, on/off switches, and both led lights, still have 18 volts, lights into at this time. Can you help me with this?