Air Conditioning Control / Computer Circuit Board – Replacement for M518F3N, M518F3 (301353061, 300355624) – GRJ518-A3 / GRJ518-A6

High-quality replacement computer/circuit board for air conditioning systems. This unit is compatible with model numbers M518F3N and M518F3 and matches part references 301353061 and 300355624. It also fits GRJ518-A3 and GRJ518-A6 configurations. Use as a direct swap for a faulty control board to restore normal operation. Verify your existing part number before purchase to ensure compatibility.