Tempstar Control Board for T4A330GKD300 — Comfort Alert Module | Ships Today
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Overview
This OEM Comfort Alert control board (Tempstar part number 1177402) is the compressor diagnostic module for your Tempstar T4A330GKD300 condensing unit. It continuously monitors compressor voltage and current draw to detect faults — locked rotor, open circuit, low voltage, short cycling, and missing run capacitor — and flashes a coded LED so a technician can diagnose problems without tearing the unit apart. When this board fails or loses communication, you lose that protection and diagnostics, and in some configurations the compressor may not energize at all. Symptoms include a dark or stuck-flashing LED, repeated nuisance lockouts, or a compressor that won't run despite a good contactor and capacitor.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1177402 |
| Type | Comfort Alert Diagnostic Control Board |
| Brand | Tempstar |
| Function | Compressor monitoring / fault diagnostics |
| Control Voltage | 24V |
| Indicators | LED flash-code fault status |
Compatibility
Engineered as a direct OEM replacement for the Tempstar T4A330GKD300 condensing unit. The 1177402 Comfort Alert module is used across compatible ICP-family condensers (Tempstar, Heil, Comfortmaker) — confirm your unit was originally equipped with a Comfort Alert board before ordering.
Installation Guide
- Safety First — Disconnect power at the outdoor disconnect and breaker, then verify zero voltage with a multimeter.
- Access — Remove the condenser unit's electrical access panel.
- Document — Photograph every low-voltage and sensing lead landed on the board before disconnecting.
- Remove — Unplug the harness connectors, release the standoffs or screws, and lift out the old board.
- Install — Snap the new board onto the standoffs and reconnect each lead exactly per your photo.
- Test — Restore power, run a cooling cycle, and confirm a steady/normal LED status with no fault codes.
Signs You Need a Replacement
- No LED activity or a permanently stuck fault flash code
- Repeated nuisance compressor lockouts with no underlying fault
- Compressor won't energize despite a good contactor and capacitor
- Visible burnt traces, swollen components, or a scorched smell 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