What are the specs for this Control Board?

The correct replacement for Tempstar model T4A324GKA200 — Comfort Alert Diagnostics 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 T4A324GKA200 — Comfort Alert Diagnostics 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 Control Board for T4A324GKA200 — Comfort Alert Diagnostics Module | Ships Today

Name: Tempstar Control Board for T4A324GKA200 — Comfort Alert Diagnostics Module | Ships Today
Brand: Tempstar
SKU: 1177402-GEN
Price: 249.00 USD
Availability: InStock

SKU: 1177402-GEN Brand: Tempstar

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Overview

This OEM Comfort Alert control board (part number 1177402) is the diagnostic and protection module for the Tempstar T4A324GKA200 condensing unit. It continuously monitors compressor and system operation, detecting fault conditions such as long run cycles, locked rotor, low voltage, and short cycling, and reports them through an on-board diagnostic LED. A failed board can leave the system unable to start, short-cycling, throwing false fault codes, or running without compressor protection — risking expensive compressor damage. Installing the genuine OEM board restores factory diagnostics and the manufacturer's protection logic.

Specifications

Spec	Value
Part Number	1177402
Type	Comfort Alert Diagnostics Control Board
Brand	Tempstar (ICP / Heil)
Function	Compressor monitoring & fault diagnostics
Fitment	OEM replacement

Compatibility

Engineered as a direct OEM fit for the Tempstar T4A324GKA200 condensing unit and shared across compatible ICP-family (Heil, Comfortmaker, Tempstar) platforms that use the Comfort Alert module. Always confirm the printed part number 1177402 against your existing board before installing.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
Access — Remove the condenser service panel to expose the control area.
Document — Photograph every wire and terminal connection before disconnecting anything.
Remove — Label and unplug the harness connections, release the mounting standoffs/screws, and lift out the old Comfort Alert board.
Install — Seat the new board on the standoffs, secure it, and reconnect each lead exactly per your photo.
Test — Restore power, confirm the diagnostic LED shows a normal status, and verify the unit starts and runs correctly.

Signs You Need a Replacement

System will not start or short-cycles repeatedly
Diagnostic LED is dark, flashing fault codes, or behaving erratically
False trip conditions with no real fault present
Loss of compressor protection or intermittent operation

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 Control Board for T4A32...

$249.00

Frequently Asked Questions

Does this Control Board fit my Tempstar T4A324GKA200 — Comfort Alert Diagnostics Module | Ships Today?

Yes. This is the factory-specified OEM control board for the Tempstar T4A324GKA200 — Comfort Alert Diagnostics 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 T4A324GKA200 — Comfort Alert Diagnostics 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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