ICP Control Board for WAHM304A1 — Fan Coil Control Board | Ships Today

Overview

This is a genuine OEM fan coil control board (part number 1172975) for the ICP/Heil/Tempstar WAHM304A1 air handler. The board is the brain of the fan coil — it interprets thermostat demands, sequences the blower and electric heat relays, manages the 24V control circuit, and provides safety interlocks. When the board fails, the air handler may not respond to the thermostat, the blower may fail to energize or run continuously, or electric heat staging may stop working. Replacing the control board restores correct sequencing and reliable operation of the unit.

Specifications

Compatibility

Direct OEM fit for the ICP/Heil/Tempstar WAHM304A1 air handler and compatible WAHM-series fan coils. Confirm the part number stamped on your existing board and the harness/connector layout before installing.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before servicing.
2. Access — Remove the air handler service panel to expose the control board.
3. Document — Photograph every connector, wire color, and terminal position before disconnecting anything.
4. Remove — Unplug the wiring harnesses and low-voltage leads, then unscrew the board from its standoffs.
5. Install — Mount the new board on the standoffs and reconnect every harness and lead exactly per your photo.
6. Test — Restore power and verify the blower, heat staging, and thermostat response operate correctly.

Signs You Need a Replacement

• Air handler does not respond to the thermostat
• Blower runs continuously or will not energize
• Electric heat stages fail to engage
• Visible scorching, burnt traces, or failed relays on the board

Shipping & Returns

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