P40/30 WIRING KIT (RELAY BOARD)

The 521052 Suburban RV Furnace P-40/30 Fan Control Wiring Kit is an OEM wiring and control-interface kit for Suburban P-30 and P-40 furnaces. This kit is essential for correctly sequencing the blower motor, safety switches, and ignition board in these higher-output furnaces.

When the original harness becomes damaged or brittle, this kit restores factory-correct operation, ensuring the furnace runs through its ignition and shutdown cycles safely. It includes the correct connectors, wire lengths, and color coding to match OEM specifications, preventing issues like blower-only operation, no-heat conditions, or intermittent cycling.