56-1956-00: Replacement VR-21 Regulator Control Board for Onan 332-1956

56-1956-00: Replacement VR-21 Regulator Control Board for Onan 332-1956

Factory Direct Price: $350.00

Quantity in Basket: None


Buy with Confidence

Replacement Onan Voltage Regulator Control Board

This item is built in the USA and backed by a 2-year warranty


  • Mounting footprint and terminal locations are identical to original board.
  • Heavy conformal coating applied for moisture and vibration resistance.
  • Upgraded components used throughout the board.
  • Improved, more durable K1 relay.
  • Rugged barrier strip.
  • Two-Year Warranty.
  • Also available: A modified version of the 56-1956-00 to replace Onan P/N 332-2045
  • Maintenance Suggestion: When replacing the Onan VR21 Controls, Flight Systems Technical Service recommends replacing the SCR Pack*. You can purchase the SCR pack directly from us or through an Onan dealer.
  • *Older units may use a multi-component SCR assembly (332-0491) if this has failed, we can convert to use the newer SCR Pack, but the assembly must be sent to our shop.
  • Click here for a PDF with detailed information for this product

    Return Policy: Unwanted items may be returned within 30 days of the original purchase date. Refund/credit issued will be subject to a 25% per item restocking/re-test fee as long as unit is in new, undamaged condition. Shipping charges are not refundable.

    Orders placed after 4pm Friday or during the weekend will ship the following Monday.

    Orders ship from Pennsylvania