Tempstar Control Board for T4A360GKD300 — ComfortAlert Diagnostic Module | Ships Today
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
Overview
This OEM ComfortAlert control board (part number 1177402) is the diagnostic module for your Tempstar T4A360GKD300 condensing unit. It continuously monitors the compressor and electrical system, detecting and flashing fault codes for conditions such as low voltage, locked rotor, open circuit, missing phase, and short cycling. By interpreting compressor current and voltage, the board protects the compressor from damaging operating conditions and gives technicians fast, accurate troubleshooting through its LED status indicators. A failed or faulty board can cause intermittent no-cool conditions, nuisance lockouts, or loss of compressor protection. Installing the correct factory module restores both reliable operation and built-in diagnostics.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1177402 |
| Type | ComfortAlert Diagnostic Control Board |
| Brand | Tempstar |
| Control Voltage | 24V |
| Function | Compressor Monitoring & Fault Codes |
| Application | AC Compressor / Heat Pump |
Compatibility
Direct OEM replacement for the Tempstar T4A360GKD300 condensing unit. The same ComfortAlert module is used across matching ICP-family condensers including comparable Heil, Comfortmaker, and ICP units that originally shipped with part number 1177402. Confirm the part number on your existing board before ordering.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
- Access — Remove the condenser service / control panel.
- Document — Photograph every wire and terminal connection before disconnecting.
- Remove — Disconnect the low-voltage leads and unsnap or unscrew the old board from its standoffs.
- Install — Mount the new ComfortAlert board and reconnect each lead exactly as photographed.
- Test — Restore power, place a cooling call, and confirm normal operation with a steady status LED and no fault codes.
Signs You Need a Replacement
- Persistent or erratic fault-code flashes with no real fault
- Compressor will not start or randomly locks out
- Intermittent no-cool or short-cycling behavior
- Status LED is dark or unresponsive with power 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