Tempstar Control Board for T2A330GKD100 — ComfortAlert Diagnostic Module | Ships Today
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Overview
This is the genuine OEM ComfortAlert diagnostic control board (part number 1177402) for the Tempstar T2A330GKD100 condensing unit. The ComfortAlert module continuously monitors compressor and system electrical operation, watching for conditions such as low voltage, locked rotor, open circuit, missing run capacitor, welded contactor, and short cycling. When a fault occurs it flashes a coded LED so a technician can diagnose the problem in minutes instead of hours. A failed board commonly shows up as a unit that will not start, intermittent compressor operation, or a steady alert LED that never clears. Operating on 24V control voltage, it is the brain that protects the compressor — the most expensive component in the system — from premature failure.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1177402 |
| Type | ComfortAlert Diagnostic Control Board |
| Brand | Tempstar (OEM) |
| Control Voltage | 24V |
| Function | Compressor & system fault monitoring |
| Fits Model | T2A330GKD100 |
Compatibility
Designed as a direct-fit replacement for the Tempstar T2A330GKD100 air conditioning condenser. This ComfortAlert module is also used across related ICP, Heil, and Comfortmaker single-stage condensing units that originally shipped with part 1177402. Always confirm the printed part number on your existing board before installing.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter before touching any wiring.
- Access — Remove the condenser service panel to expose the control box.
- Document — Photograph every wire and terminal on the existing board before disconnecting anything.
- Remove — Label and disconnect the low-voltage leads, release the mounting clips or screws, and lift out the old board.
- Install — Mount the new board in the same orientation and reconnect each wire exactly per your photo.
- Test — Restore power, run a cooling cycle, and confirm the status LED shows normal operation with no fault codes.
Signs You Need a Replacement
- Compressor will not start or short cycles repeatedly
- Steady or rapidly flashing fault LED that will not clear
- No response from the unit even with confirmed 24V at the board
- Visible burn marks, corrosion, or scorched traces on the board
Shipping & Returns
Ships same day on orders placed before 3 PM CST. 30-day returns on unused parts. 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