Tempstar Control Board for T4A460GKD200 — Comfort Alert Module | Ships Today

Overview

This is the OEM Comfort Alert control board / diagnostics module (part number 1177402) for the Tempstar T4A460GKD200 condensing unit. The Comfort Alert module monitors the compressor and high-voltage circuit, watching for conditions such as locked rotor, low/high voltage, open circuits, welded contactor, and short-cycling. It communicates fault status through a flashing diagnostic LED, letting a technician pinpoint a failing compressor or electrical fault before it turns into a costly callback. When the board fails, you may see no diagnostics, false fault codes, a compressor that won't start despite a good contactor and capacitor, or erratic cooling behavior.

Specifications

Compatibility

Direct OEM fit for the Tempstar T4A460GKD200 condenser and the equivalent ICP, Heil, and Comfortmaker units that share this platform. Confirm the part number and connector layout against your existing module before installing.

Installation Guide

1. Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter.
2. Access — Remove the condenser control/access panel to reach the mounted board.
3. Document — Photograph all plug and terminal connections before unplugging the board.
4. Remove — Disconnect the low- and high-voltage leads and unsnap or unscrew the board from its standoffs.
5. Install — Mount the new board on the standoffs and reconnect every lead exactly per your photo.
6. Test — Restore power, call for cooling, and confirm the diagnostic LED shows normal operation with no fault flashes.

Signs You Need a Replacement

• No diagnostic LED activity at all
• Persistent or nonsensical fault codes with no real fault present
• Compressor won't start despite a good contactor and capacitor
• Visible burn marks or corrosion on the board

Shipping & Returns

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