All ActivityMost RecentMost LikesSolutionsRe: The dreaded code 36 I own onan 5500 comercial, I change fuel pump, oil,etc. even change harness, still code 36. When unit goes down, and press to prime the system no hour meter or pump running. I press J1 of control board specific the left side pump start woriking and hour meter, maye be at least a day. next have to do same thing. Please advice, should I buy a new control board?