What are the specs for this Control Board?

The correct replacement for Tempstar model T4A324GKD200 — Compressor Diagnostic Module | Ships Today is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Tempstar equipment which lists the model number T4A324GKD200 — Compressor Diagnostic Module | Ships Today.

Is this control board compatible with Bryant or Payne systems too?

Many Tempstar parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

Tempstar

Tempstar Comfort Alert Control Board for T4A324GKD200 — Compressor Diagnostic Module | Ships Today

Name: Tempstar Comfort Alert Control Board for T4A324GKD200 — Compressor Diagnostic Module | Ships Today
Brand: Tempstar
SKU: 1177402-GEN
Price: 159.95 USD
Availability: InStock

SKU: 1177402-GEN Brand: Tempstar

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Overview

This is the OEM Comfort Alert control board (part number 1177402) for the Tempstar T4A324GKD200 condensing unit. The Comfort Alert module is a compressor diagnostic board that continuously monitors the outdoor unit's compressor and 24V control circuit. It watches for conditions such as locked rotor, open circuit, short cycling, low voltage, missing run capacitor, and welded contactor, then flags faults with a status LED so a technician can pinpoint the problem quickly. When this board fails, the system may lose protective monitoring, throw false fault codes, or fail to energize the compressor at all. Replacing it with the correct OEM module restores both proper operation and the built-in diagnostics that protect the compressor from premature failure.

Specifications

Spec	Value
OEM Part Number	1177402
Type	Comfort Alert Compressor Diagnostic Control Board
Brand	Tempstar
Control Voltage	24V
Function	Compressor monitoring & fault diagnostics
Fitment	OEM Replacement

Compatibility

A direct OEM replacement for the Tempstar T4A324GKD200 condensing unit. As a Carrier/ICP family part (1177402), it also services comparable Tempstar, Heil, Comfortmaker, and ICP outdoor units that use the Comfort Alert diagnostic module. Confirm the part number on your existing board before ordering.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and breaker. Verify zero voltage at the board with a multimeter.
Access — Remove the condensing unit's service/control panel.
Document — Photograph every wire and connector position before disconnecting.
Remove — Unplug the low-voltage leads and any quick-connects, then unscrew or unclip the old board from its standoffs.
Install — Mount the new Comfort Alert board on the standoffs and reconnect each lead exactly per your photo.
Test — Restore power, call for cooling, and confirm the status LED shows normal operation with no fault flashes.

Signs You Need a Replacement

Status LED is dark or flashing persistent, unexplained fault codes.
Compressor won't energize even with a good contactor and capacitor.
System short-cycles or trips on protection without a real fault.
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

Tempstar Comfort Alert Control B...

$159.95

Frequently Asked Questions

Does this Control Board fit my Tempstar T4A324GKD200 — Compressor Diagnostic Module | Ships Today?

Yes. This is the factory-specified OEM control board for the Tempstar T4A324GKD200 — Compressor Diagnostic Module | Ships Today. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the control board on my Tempstar T4A324GKD200 — Compressor Diagnostic Module | Ships Today?

Difficulty: Advanced (1–2 hrs)
Step 1: Turn off breaker. Step 2: PHOTOGRAPH all wire connections before touching anything. Step 3: Label each wire with tape. Step 4: Disconnect all wires, remove old board. Step 5: Mount new board, reconnect all wires matching your photo exactly. Step 6: Restore power and test all modes. Exact part number match is critical.

My HVAC system is completely dead. What could be wrong?

Completely dead HVAC (no LED on board) = failed control board or blown fuse. Check board fuse first (3A or 5A, costs $1–$5). If fuse is good and board has power but no LED, board is dead. Always photograph wiring before replacing.

Is this control board compatible with Bryant or Payne too?

Many Tempstar parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my Tempstar control board?

OEM essential. Control boards are model-specific with precise firmware and connector layouts. Aftermarket boards rarely match all functions and can cause intermittent failures or safety issues. Always match the exact OEM part number.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

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