What are the specs for this Control Board?

The correct replacement for Tempstar model TXA661GKA100 — 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 TXA661GKA100 — 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 TXA661GKA100 — Diagnostic Module | Ships Today

Name: Tempstar Comfort Alert Control Board for TXA661GKA100 — Diagnostic Module | Ships Today
Brand: Tempstar
SKU: 1177402-GEN
Price: 189.00 USD
Availability: InStock

SKU: 1177402-GEN Brand: Tempstar

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Overview

This OEM Comfort Alert control board (part 1177402) is the diagnostic and protection module for the Tempstar TXA661GKA100. It continuously monitors compressor performance and flashes coded faults for conditions like low voltage, locked rotor, open circuit, short cycling, and missing run capacitor — turning hours of guesswork into a quick LED readout. When this board fails, the unit may lose compressor protection, refuse to start, or throw erratic fault codes. A failed board commonly results from voltage surges, lightning, or a contactor/compressor fault that damages the module.

Specifications

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

Compatibility

Direct-fit replacement for the Tempstar TXA661GKA100 and matching ICP/Heil condensing units equipped with the Comfort Alert diagnostic system. Match the printed 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 electrical service panel.
Document — Photograph every low-voltage and sensor lead before disconnecting.
Remove — Unplug the harness connectors and unclip or unscrew the old board.
Install — Mount the new board and reconnect each connector per your photo.
Test — Restore power and confirm a steady status LED with no active fault codes.

Signs You Need a Replacement

No status LED or a dead diagnostic display.
Compressor won't start despite a valid cooling call.
Random or nonsensical fault codes flashing.
Loss of compressor protection after a power surge or strike.

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 Comfort Alert Control B...

$189.00

Frequently Asked Questions

Does this Control Board fit my Tempstar TXA661GKA100 — Diagnostic Module | Ships Today?

Yes. This is the factory-specified OEM control board for the Tempstar TXA661GKA100 — 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 TXA661GKA100 — 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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