Tempstar Control Board for T4A348GKA200 — Comfort Alert OEM 1177402 | Ships Today

Overview

This is the OEM Comfort Alert control board (part number 1177402) for the Tempstar T4A348GKA200 condensing unit. The Comfort Alert module monitors compressor electrical operation and provides on-board diagnostics, flashing fault codes for conditions such as locked rotor, open circuit, low voltage, short cycling, and welded contactor. It also provides compressor protection by interrupting operation under fault conditions. When this board fails, you may lose protection features, get false fault codes, or have a unit that won't run at all. This factory board restores correct monitoring and protection logic.

Specifications

Compatibility

Built for the Tempstar T4A348GKA200 air conditioner and the related ICP/Heil/Comfortmaker condensing units that use the Comfort Alert diagnostic module. Confirm your existing board part number and connector layout before installing.

Installation Guide

1. Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter.
2. Access — Remove the electrical access panel to expose the control board.
3. Document — Photograph all sense leads and the 24V connections to the board.
4. Remove — Disconnect the wiring, release the board standoffs/screws, and lift out the old module.
5. Install — Seat the new board on the standoffs and reconnect every lead exactly per your photo.
6. Test — Restore power, run a cooling cycle, and verify the status LED shows normal operation with no fault flashes.

Signs You Need a Replacement

• No status LED or a board that won't power up
• Constant or false fault codes with a healthy compressor
• Loss of compressor protection or unexplained short cycling
• Visible burn marks, swollen components, 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.