Tempstar Defrost Control Board for T4H560GKA100 — OEM 1173636 | Ships Today

Overview

The Tempstar 1173636 defrost control board manages the defrost cycle on the T4H560GKA100 heat pump. It tracks outdoor coil temperature and compressor run time, then sequences the reversing valve, outdoor fan, and auxiliary heat to melt frost from the coil in cold weather. A failing board can leave the outdoor coil iced solid, lock the unit in continuous defrost, short-cycle the compressor, or ignore thermostat calls altogether. This genuine OEM board is a direct-fit replacement with the factory terminal layout and timing logic — no generic cross-reference or rewiring required.

Specifications

Compatibility

Engineered for the Tempstar T4H560GKA100 heat pump and shared across related ICP/Heil/Comfortmaker platforms that use the same defrost board. Confirm the printed part number on your current board reads 1173636 before installing.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage at the board with a multimeter.
2. Access — Remove the outdoor unit's electrical control panel cover.
3. Document — Photograph every wire and terminal position before disconnecting.
4. Remove — Label and disconnect the low-voltage and sensor leads, release the standoffs/screws, and lift out the old board.
5. Install — Mount the new 1173636 board on the same standoffs and reconnect each lead per your photos, including the coil temperature sensor.
6. Test — Restore power, run the system in heating, and confirm defrost initiates and terminates normally.

Signs You Need a Replacement

• Outdoor coil freezes over and never clears in heat mode
• Unit stuck in continuous defrost or blowing cold air indoors
• Reversing valve, fan, or compressor fail to switch on schedule
• Burn marks, corrosion, or failed relays on the existing board

Shipping & Returns

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