Uncertain if the problem is the Control Board, Voltage Regulator, or something else? Click here to download our handy OnanŽ RV Gen Set Troubleshooting Guide.
Flight Systems' Manufactured Replacement ONAN Generator Circuit Board
*Please verify actual board P/N in gen set - many 3056 boards have been upgraded to the 300-3763.
Flight Systems part number 56-3056-00 is an improved, direct replacement for the main control board used in several models of Onan Emerald and Marquis Series Gen Sets.
Features include improved circuit and harness design, heavy duty relays, added ignition circuit voltage protection and heavy conformal coating (to protect against corrosion - a major enemy of any RV generator control).
It is built in the USA and backed by a 2-year Warranty.
This board replaces the following ONAN part numbers: 300-3056, 300-3056-01, 300-3687, 300-3687-01, 300-3950
These control boards were used in the following Onan Emerald RV Gen Set Models:
• BGE: Spec F,G
• BGEL: Spec E,F,G
• NHE: Spec D,E,F,G
• NHEL: Spec D,E,G
They were also used in the following Marquis Gen Set Models:
• BGM: Spec A
• NHM: Spec A
Return Policy: Unwanted items may only be returned within 30 days of original purchase date. Refund/credit issued shall be less a $25 per item restocking/re-test fee as long as unit is in new, undamaged condition. Shipping charges are not refundable.
