ICP Control Board Kit for RHH036S0CA0AAAA — OEM Defrost/Heat Pump Board | Ships Today

Overview

This OEM control board kit (part 1183618) is the brain of your ICP (Tempstar/Heil) RHH036S0CA0AAAA heat pump. It manages the defrost cycle, sequences the compressor and reversing valve, monitors sensors, and protects the system with built-in timing and lockout logic. Control boards fail from voltage spikes, lightning, moisture, heat stress, and aged solder joints. When the board goes bad, you may see no defrost cycle, a unit that won't respond to the thermostat, the system stuck in one mode, error or fault LEDs, or no output to the compressor and fan.

Specifications

Compatibility

Designed for the ICP/Tempstar/Heil RHH036S0CA0AAAA 3-ton heat pump and matched RHH036 series units. Compare the OEM part number and connector layout to your existing board before ordering.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the control compartment panel.
3. Document — Photograph every plug and harness location before unplugging the old board.
4. Remove — Unplug each connector, release the board standoffs or screws, and lift the board out.
5. Install — Mount the new board on the standoffs and reconnect every harness to its matching socket per your photo.
6. Test — Restore power, watch the diagnostic LED, and verify normal heating, cooling, and defrost operation.

Signs You Need a Replacement

• No defrost cycle in heating mode
• System unresponsive to thermostat calls
• Fault or error LED flashing on the board
• No output to compressor or fan despite a valid call

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.