Thor Forums

[Luke D]

Originally Posted by BeardyMcWeirdy

Luke, It sounds like I may have a similar issue as you. Did your generator spit out any fault codes? I have a 2018 Onan KY but it is spitting out a "4-8". Generator field sense. Can't find anyone online with experience with this code

Mine had an after market Flight Systems control board, their board will not display codes. Flight System’s eliminated the code error system on all their boards. Needless to say I re- installed an Onan OEM board.
My experience with code 48 is a field voltage issue. Now can be corrosion on slip rings, bad brushes and believe it or not there is a way to adjust field voltage. Your control board regulates the 12 volts needed to run not field voltage . Your field voltage is the 110 the generator sends to power your RV. The engine requires 12 volts to run engine. The conversion another control board function Does generator run ?
Or only run when switch is held?