Tempstar Control Board for T2A342GKD100 — Comfort Alert Diagnostic Module | Ships Today
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Overview
This OEM Comfort Alert control board (part number 1177402) is the diagnostic and protection module for your Tempstar T2A342GKD100 condensing unit. It continuously monitors the single-phase scroll compressor and translates electrical and mechanical faults — locked rotor, open circuit, short cycling, low or high voltage, missing run capacitor, and welded contactor — into a flashing diagnostic LED code that lets a technician pinpoint problems in minutes instead of hours. When this board fails or its diagnostics stop responding, the unit may run without protection, short cycle, or refuse to start, putting the compressor at risk. Replacing it restores both the safety logic and the fast troubleshooting it was designed to provide.
Specifications
| Spec | Value |
|---|---|
| OEM Part Number | 1177402 |
| Type | Comfort Alert Compressor Diagnostic Control Board |
| Brand | Tempstar (ICP / Heil) |
| Control Voltage | 24V |
| Function | Compressor monitoring & fault diagnostics |
| Fits Model | T2A342GKD100 |
Compatibility
Direct-fit OEM replacement for the Tempstar T2A342GKD100 single-phase condensing unit. The Comfort Alert module under part 1177402 is shared across many ICP-family scroll-compressor condensers and heat pumps (Tempstar, Heil, Comfortmaker, Arcoaire). Verify your existing board carries the 1177402 number before installing.
Installation Guide
- Safety First — Disconnect power at the breaker and disconnect, then verify zero voltage with a multimeter.
- Access — Remove the condenser service panel to reach the control box.
- Document — Photograph all low-voltage and sense leads landing on the board before removing anything.
- Remove — Unplug the harness connectors, release the mounting standoffs or screws, and lift out the old board.
- Install — Seat the new board on its standoffs and reconnect each harness per your photo.
- Test — Restore power, run a cooling call, and confirm the diagnostic LED reports normal operation with no fault codes.
Signs You Need a Replacement
- Diagnostic LED is dark or frozen and no longer reports compressor status.
- Compressor short cycles or trips on protection with no real fault present.
- Unit runs without responding to the board's protection logic.
- Visible burn marks, corrosion, or scorched traces on the board.
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