ICP Defrost Control Board for YG048GC2 — 24V Heat Pump Board | Ships Today

Overview

This OEM defrost control board (part number 34332101) manages the defrost cycle on your ICP Tempstar Heil YG048GC2 heat pump. It reads coil temperature and accumulated run time, then drives the unit into and out of defrost so the outdoor coil stays clear of frost during heating. Operating on 24V control voltage, the board coordinates the reversing valve, outdoor fan, and auxiliary heat. A failed board commonly shows up as a coil that ices over, a unit stuck in defrost, no defrost cycle at all, or auxiliary heat that stays off. Installing a fresh OEM board returns the heat pump to efficient, reliable operation.

Specifications

Compatibility

Factory replacement for the ICP Tempstar Heil YG048GC2 heat pump and other ICP-family condensing units that originally shipped with board 34332101. Match your existing board's part number 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 outdoor unit's control-panel service cover.
3. Document — Photograph every wire and terminal position before disconnecting.
4. Remove — Label and unplug the low-voltage harness, release the standoff clips, and lift out the old board.
5. Install — Snap the new board onto the standoffs and reconnect each wire to its matching terminal per your photo.
6. Test — Restore power, confirm normal heating, then force or wait for a defrost cycle to verify proper sequencing.

Signs You Need a Replacement

• Outdoor coil ices over and never clears
• Unit stuck in defrost or never enters defrost
• Reversing valve or auxiliary heat fails to energize on schedule
• No 24V output to defrost-controlled components

Shipping & Returns

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