ICP Fan Coil Control Board for WAHT304A1 — OEM Air Handler Board | Ships Today

Overview

This is a genuine OEM fan coil control board (part #1172975) for the ICP WAHT304A1 air handler. The board is the brain of the air handler: it receives the 24V thermostat signals, energizes the blower motor and electric heat relays, manages blower speed and timing, and protects the system through its onboard fusing and sequencing logic. A failed control board commonly causes no blower operation, the blower running constantly or at the wrong speed, intermittent dropouts, or no response at all to a thermostat call. Visual signs include scorched or swollen components, a blown onboard fuse, or relays that chatter instead of pulling in cleanly.

Specifications

Compatibility

Built as a direct-fit replacement for the ICP WAHT304A1 air handler and shared across ICP-family fan coil units (Tempstar, Heil, Comfortmaker, Arcoaire) that use the 1172975 board. Match the part number and connector layout against your existing board before installing.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage at the unit with a multimeter.
2. Access — Remove the air handler control compartment access panel.
3. Document — Photograph every wire harness and terminal connection on the board before disconnecting.
4. Remove — Unplug all connectors, remove the mounting screws or standoffs, and lift out the failed board.
5. Install — Mount the new board on the same standoffs and reconnect each harness to its matching terminal exactly per your photo.
6. Test — Restore power and confirm correct blower operation and proper response to heat and cool calls.

Signs You Need a Replacement

• Blower does not run on any thermostat call
• Blower runs continuously or at the wrong speed
• Intermittent operation or random shutdowns
• Blown onboard fuse, scorched traces, or chattering relays

Shipping & Returns

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