ICP Defrost Control Board for YA075FA1 — 24V Heat Pump | Ships Today

Overview

This OEM defrost control board (part #1052757) governs the defrost cycle on your ICP/Heil/Tempstar YA075FA1 heat pump. Running on a 24V control circuit, it tracks outdoor coil temperature and compressor run time, then triggers the reversing valve and outdoor fan to melt frost from the coil in cold-weather heating. A failed board causes the coil to ice over, the system to run nonstop or short-cycle, and heating output to drop. Installing the correct OEM board restores proper defrost timing and protects the compressor from icing damage.

Specifications

Compatibility

Direct OEM fit for the ICP/Heil/Tempstar YA075FA1 heat pump and equivalent Heil, Tempstar, and Comfortmaker units sharing this defrost board. Confirm the part number on your existing board before ordering.

Installation Guide

1. Safety First — Disconnect power at the breaker and 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 on the existing board before disconnecting.
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, match any dip-switch/jumper settings to the original, and reconnect each harness per your photos.
6. Test — Restore power, initiate a forced 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 starts or never ends.
• Visible burn marks, corrosion, or a failed relay on the board.

Shipping & Returns

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