ICP Defrost Control Board for YA075HA1 — 24V Heat Pump | Ships Today

Overview

This OEM defrost control board (part #1052757) is the brain of the defrost cycle on your ICP/Heil/Tempstar YA075HA1 heat pump. Operating on a 24V control circuit, it monitors coil temperature and run time, then commands the reversing valve and outdoor fan to clear frost from the outdoor coil during cold weather. When this board fails, the system can ice over, run continuously, short-cycle, or stop heating entirely. Replacing it with the correct OEM board restores proper defrost timing and protects the compressor.

Specifications

Compatibility

Engineered as a direct OEM fit for the ICP/Heil/Tempstar YA075HA1 heat pump and equivalent units across the Heil, Tempstar, and Comfortmaker family that share this defrost board. Always confirm the part number stamped on your existing board before ordering.

Installation Guide

1. Safety First — Disconnect power at the breaker and the outdoor disconnect; verify zero voltage with a multimeter.
2. Access — Remove the outdoor unit's control-panel service cover.
3. Document — Photograph every wire and connector position on the existing board before disconnecting anything.
4. Remove — Label and unplug the low-voltage harnesses and sensor leads, then unscrew the old board from its standoffs.
5. Install — Mount the new board, verify dip-switch/jumper settings match the original, and reconnect each harness per your photos.
6. Test — Restore power, force a defrost test, and confirm the reversing valve and outdoor fan respond correctly.

Signs You Need a Replacement

• Outdoor coil ices over and never clears in heating mode.
• Heat pump runs continuously or short-cycles in cold weather.
• Defrost cycle never initiates or never terminates.
• Visible burn marks, corrosion, or a blown relay on the board.

Shipping & Returns

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