ICP Defrost Control Board for YE030G — Heat Pump Timer | Ships Today

Overview

This is the genuine OEM defrost control board (part number 34332101) for the ICP/Heil/Tempstar YE030G heat pump. The defrost board manages the outdoor unit's defrost cycle — it reads the defrost thermostat and coil temperature, runs the timed defrost interval, switches the reversing valve, and cycles the outdoor fan to melt frost off the coil during heating mode. A failed board lets the coil ice up in winter, prevents proper defrost, causes short-cycling, or kills heating output. Replacing it restores correct defrost timing and protects the compressor from liquid slugging and icing damage.

Specifications

Compatibility

Direct factory replacement for the ICP/Heil/Tempstar YE030G heat pump and other ICP-family outdoor units that use defrost board 34332101. Verify the printed part number on 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 electrical service panel on the condensing unit.
3. Document — Photograph every wire and connector on the board before disconnecting.
4. Remove — Unplug the low-voltage harness and high-voltage leads, release the board standoffs or screws, and lift out the old board.
5. Install — Seat the new board on its standoffs and reconnect every wire exactly per your photo, confirming the defrost thermostat leads are correct.
6. Test — Restore power and verify the unit initiates and terminates a defrost cycle normally.

Signs You Need a Replacement

• Outdoor coil ices over and won't clear in heating mode
• Heat pump fails to defrost or runs an endless defrost cycle
• Reversing valve or outdoor fan won't switch on defrost
• Intermittent or no heating output and short-cycling in cold weather

Shipping & Returns

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