What are the specs for this Control Board?

The correct replacement for Tempstar model T2A318GKD200 – Comfort Alert Diagnostic | 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 T2A318GKD200 – Comfort Alert Diagnostic | 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 T2A318GKD200 – Comfort Alert Diagnostic | Ships Today

Name: Tempstar Control Board for T2A318GKD200 – Comfort Alert Diagnostic | Ships Today
Brand: Tempstar
SKU: 1177402-GEN
Price: 184.95 USD
Availability: InStock

SKU: 1177402-GEN Brand: Tempstar

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Overview

This is a genuine OEM Comfort Alert control board (Part No. 1177402) for the Tempstar T2A318GKD200 condensing unit. The Comfort Alert module is a compressor diagnostic board that monitors the compressor and outdoor unit electrical signature in real time, detecting faults such as low line voltage, locked rotor, open run capacitor, missing 24V signal, and welded contactor conditions. It communicates these faults through an onboard status LED flash code, which dramatically shortens diagnostic time in the field. When this board fails, the outdoor unit may lose protective monitoring, fail to stage properly, or stop responding to thermostat calls entirely. Replacing it with the correct OEM module restores both compressor protection and the built-in diagnostics technicians rely on.

Specifications

Spec	Value
OEM Part Number	1177402
Type	Comfort Alert Compressor Diagnostic Control Board
Brand	Tempstar
Function	Compressor monitoring & fault flash-code diagnostics
Mounting	Outdoor unit control panel

Compatibility

Designed as the factory replacement for the Tempstar T2A318GKD200 air conditioning condenser. The Comfort Alert diagnostic module is shared across many ICP-family outdoor units (Heil, Comfortmaker) of this generation. Verify the part number and connector layout against your existing board before installing.

Installation Guide

Safety First – Disconnect power at the outdoor disconnect and breaker, then verify zero voltage with a multimeter.
Access – Remove the condenser control panel cover to expose the board.
Document – Photograph every connector and wire location on the existing board.
Remove – Unplug the low-voltage and sense leads, then release the board from its standoffs or mounting screws.
Install – Mount the new board and reconnect each lead exactly per your photo.
Test – Restore power, call for cooling, and confirm the status LED shows a normal run code.

Signs You Need a Replacement

No status LED activity or a continuous fault flash code with no real fault present.
Outdoor unit fails to start despite a confirmed 24V call.
Erratic compressor cycling or loss of protective lockout.
Visible burn marks, corrosion, or damaged traces on the board.

Shipping & Returns

Ships same day on orders placed 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 T2A31...

$184.95

Frequently Asked Questions

Does this Control Board fit my Tempstar T2A318GKD200 – Comfort Alert Diagnostic | Ships Today?

Yes. This is the factory-specified OEM control board for the Tempstar T2A318GKD200 – Comfort Alert Diagnostic | 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 T2A318GKD200 – Comfort Alert Diagnostic | 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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