ICP Fan Coil Control Board for WAHT424A1 — OEM Replacement | Ships Today

Overview

This genuine OEM ICP fan coil control board (part number 1172975) is the central logic board for the WAHT424A1 air handler. It manages blower operation, processes thermostat demands, sequences the electric heat (if equipped), and protects the low-voltage circuit. When the control board fails you may see no blower operation, the system ignoring thermostat calls, erratic fan cycling, or a blown control fuse. A failed board is a frequent cause of an air handler that has power but produces no airflow or heat.

Specifications

Compatibility

Direct OEM replacement for the ICP/Tempstar/Heil WAHT424A1 fan coil air handler. Match the part number printed on your existing board before ordering, since ICP uses several board revisions across the WAHT series.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the air handler control-compartment service panel.
3. Document — Photograph every wire and connector landing on the board before disconnecting.
4. Remove — Disconnect the line-voltage, low-voltage, and motor harnesses, then unclip or unscrew the old board from its standoffs.
5. Install — Mount the new board on the standoffs and reconnect every harness exactly as photographed.
6. Test — Restore power, call for fan/heat/cool, and verify correct blower operation and sequencing.

Signs You Need a Replacement

• Blower does not run even though the thermostat is calling.
• Erratic or continuous fan cycling.
• System ignores thermostat demands for heat or cool.
• Repeatedly blown low-voltage fuse or no 24V output.

Shipping & Returns

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