What are the specs for this Control Board?

The correct replacement for Tempstar model TXA648GKA100 — OEM 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 TXA648GKA100 — OEM 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 ComfortAlert Control Board for TXA648GKA100 — OEM Diagnostic Module | Ships Today

Name: Tempstar ComfortAlert Control Board for TXA648GKA100 — OEM Diagnostic Module | 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 the genuine OEM ComfortAlert control board (part #1177402) for the Tempstar TXA648GKA100 condensing unit. The ComfortAlert diagnostic module continuously monitors the compressor and its control circuit, watching for conditions like locked rotor, open circuit, low/high voltage, short cycling, and missing run capacitor. It provides flash-code diagnostics through an LED so technicians can pinpoint faults quickly, and it protects the compressor from damaging operating conditions. When this board fails or its diagnostics misbehave, you may see a compressor that won't run, false fault codes, no diagnostic LED activity, or intermittent compressor lockouts. Installing the correct OEM board restores both compressor protection and accurate fault reporting.

Specifications

Spec	Value
Part Number	1177402
Type	ComfortAlert Compressor Diagnostic Control Board
Brand	Tempstar
Control Voltage	24V
Function	Compressor monitoring & flash-code diagnostics
Fit	OEM Direct Replacement

Compatibility

Direct OEM replacement for the Tempstar TXA648GKA100 outdoor unit. The same ComfortAlert module is used across related ICP / Heil / Comfortmaker condensers on the TXA platform. Confirm the part number on your existing board before ordering.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and breaker, then verify zero voltage with a multimeter.
Access — Remove the outdoor unit's electrical service panel to expose the control board.
Document — Photograph all low-voltage and sensing connections before removing anything.
Remove — Unplug the wiring harnesses, release the board's mounting standoffs or screws, and lift out the old module.
Install — Mount the new ComfortAlert board, reseat each harness firmly per your photo, and confirm the LED is visible for diagnostics.
Test — Restore power, call for cooling, and verify the compressor starts and the diagnostic LED shows a normal status code.

Signs You Need a Replacement

Compressor won't run despite a valid cooling call
No diagnostic LED activity or a dead board
False or persistent fault / lockout codes
Intermittent short cycling traced to the diagnostic module

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 ComfortAlert Control Bo...

$184.95

Frequently Asked Questions

Does this Control Board fit my Tempstar TXA648GKA100 — OEM Diagnostic Module | Ships Today?

Yes. This is the factory-specified OEM control board for the Tempstar TXA648GKA100 — OEM 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 TXA648GKA100 — OEM 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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