Answer
Sep 05, 2025 - 08:32 AM
Yes, you are correct in your assessment. The Coleman Mach 9330C755 Heat-Ready Air Conditioner Cool Control Kit is indeed the appropriate part for adding heat capability. To install it, you will need to cut and splice your existing harness wires, as the new control box uses a terminal strip for connections. Older factory units, especially "cool-only" models, used proprietary harnesses for quick assembly, but the 9330C755 is designed for versatility, allowing you to connect individual thermostat and freeze sensor wires directly to its low-voltage terminal strip when upgrading to include a heat strip.
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