Tempstar Comfort Alert Control Board for TXA618GKA100 — Diagnostic Module | Ships Today
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
Overview
This is a genuine OEM Comfort Alert control board (part number 1177402) for the Tempstar TXA618GKA100 condensing unit. The Comfort Alert module is a compressor diagnostic and protection board that continuously monitors compressor and control-circuit performance, then signals fault conditions through a status LED flash code. It watches for issues such as locked rotor, open circuit, low line voltage, welded contactor, and missing run capacitor, helping technicians diagnose the system without guesswork. When this board fails, the unit may lose protection logic, fail to start, throw erratic fault codes, or short-cycle on a cooling call. A failing or dead diagnostic board often presents as an outdoor unit that will not run despite good power and a closed thermostat call.
Specifications
| Spec | Value |
|---|---|
| OEM Part Number | 1177402 |
| Type | Comfort Alert Diagnostic Control Board |
| Brand | Tempstar (ICP / Heil) |
| Function | Compressor Monitoring & Fault Diagnostics |
| Control Voltage | 24V |
| Indication | LED Flash Fault Codes |
Compatibility
Built for the Tempstar TXA618GKA100 air conditioner and matching ICP, Heil, Comfortmaker, and Carrier-family systems that originally shipped with OEM part 1177402. Confirm the board's connector layout and model fitment against your original module before installing.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter before touching the board.
- Access — Remove the condenser control-box service panel to expose the board.
- Document — Photograph every low-voltage lead and harness connection before disconnecting.
- Remove — Unplug the harnesses, release the standoffs/screws, and lift out the old board.
- Install — Mount the new board on the same standoffs and reconnect each harness exactly per your photo.
- Test — Restore power, call for cooling, and confirm the status LED shows a normal/healthy state with no fault flash code.
Signs You Need a Replacement
- Outdoor unit won't start even with good power and a valid cooling call.
- Erratic or constant fault flash codes that don't match real conditions.
- System short-cycles or trips protection without cause.
- Status LED is dark or unresponsive when power is applied.
Shipping & Returns
Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days