Tempstar Control Board for T4A330GKD100 — ICP ComfortAlert Diagnostic Board #1177402 | Ships Today
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Overview
This OEM Tempstar ComfortAlert control board (part #1177402) is the diagnostic and control module for the T4A330GKD100 condensing unit. It manages compressor operation, monitors system faults, and flashes diagnostic codes that pinpoint the failure — locked-rotor, low voltage, missing phase, short cycling, or open run capacitor. A failed board leaves the outdoor unit dead, erratic, or repeatedly tripping. Running on a 24V control signal, the ComfortAlert board is the brain of the condenser; it is not field-repairable and is replaced as a complete unit.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1177402 |
| Type | ComfortAlert Diagnostic Control Board |
| Brand | Tempstar (ICP / Heil) |
| Control Voltage | 24V |
| Fits Model | T4A330GKD100 |
| Fitment | OEM Direct Replacement |
Compatibility
Designed as a direct OEM replacement for the Tempstar T4A330GKD100 condensing unit. The 1177402 ComfortAlert board is shared across many ICP-family condensers and heat pumps (Tempstar, Heil, Comfortmaker, Arcoaire). Confirm the part number printed on your existing board before ordering.
Installation Guide
- Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter before touching any wiring.
- Access — Remove the condenser control panel cover to expose the control board.
- Document — Photograph every wire and connector position before disconnecting anything.
- Remove — Unplug the low-voltage harness and line-voltage leads, release the board standoffs/clips, and lift out the old board.
- Install — Snap the new board onto the standoffs and reconnect all harnesses exactly per your photos.
- Test — Restore power, initiate a cooling call, and confirm normal compressor operation with no fault flashes on the diagnostic LED.
Signs You Need a Replacement
- Outdoor unit completely dead on a cooling call
- Continuous or erratic fault codes flashing on the board LED
- Compressor short-cycling or failing to energize
- Visible burn marks, swollen capacitors, or scorching 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