ICP Defrost Control Board for YK024GC2 — Heat Pump | Ships Today

Overview

This genuine OEM defrost control board (part 34332101) is the brain of the defrost cycle on the ICP / Tempstar / Heil YK024GC2 heat pump. It monitors coil temperature and run time, then initiates and terminates defrost — reversing the valve, shutting off the outdoor fan, and energizing auxiliary heat so frost is cleared from the outdoor coil in winter. A failed defrost board lets ice build up on the coil, kills heating capacity, can trip the unit on high pressure, or strands the system in continuous defrost. Replacing it with a factory board restores correct, timed defrost behavior and protects the compressor.

Specifications

Compatibility

Built for the ICP/Tempstar/Heil YK024GC2 heat pump and related models that use this defrost control board. Match the OEM part number printed on your existing board before ordering, as defrost timing and terminal layouts vary between revisions.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker; verify zero voltage with a multimeter.
2. Access — Remove the control panel to expose the board.
3. Document — Photograph every wire and connector position and note the defrost-time jumper/pin setting.
4. Remove — Unplug the connectors, release the board standoffs, and lift the old board out.
5. Install — Mount the new board, set the defrost timing jumper to match the original, and reconnect each lead per your photo.
6. Test — Restore power, run a heating call, and verify the board initiates and terminates defrost correctly.

Signs You Need a Replacement

• Heavy ice or frost build-up on the outdoor coil
• Unit stuck in or never entering defrost
• Weak heating output or high-pressure trips in cold weather
• No response from the defrost test pins or burned board traces

Shipping & Returns

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