What are the specs for this Control Board?

The correct replacement for Tempstar model T4A460GKD300 – 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 T4A460GKD300 – 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 T4A460GKD300 – Comfort Alert Diagnostic | Ships Today

Name: Tempstar Control Board for T4A460GKD300 – Comfort Alert Diagnostic | Ships Today
Brand: Tempstar
SKU: 1177402-GEN
Price: 128.00 USD
Availability: InStock

SKU: 1177402-GEN Brand: Tempstar

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Overview

This is a genuine OEM Comfort Alert control board (part number 1177402) for the Tempstar T4A460GKD300 heat pump. The Comfort Alert module is a diagnostic and protection board that monitors the compressor and the 24V control circuit, providing fault detection and a flash-code LED that helps technicians quickly identify electrical and system problems such as locked rotor, open circuit, low voltage, and contactor faults. It protects the compressor by alerting to abnormal operating conditions before they cause permanent damage. When this board fails, the outdoor unit may not respond correctly to thermostat calls, may throw inconsistent fault codes, or may not run at all.

Specifications

Spec	Value
Part Number	1177402
Type	Comfort Alert Diagnostic Control Board
Function	Compressor Monitoring & Fault Diagnostics
Control Voltage	24V
Brand	Tempstar (ICP)
Application	Heat Pump Outdoor Unit
Fitment	OEM Replacement

Compatibility

This Comfort Alert board is the factory-specified diagnostic module for the Tempstar T4A460GKD300 heat pump condensing unit. The 1177402 is used across many ICP-family outdoor units (Tempstar, Heil, Comfortmaker); confirm the part number printed on your existing board matches before installing.

Installation Guide

Safety First – Disconnect power at the outdoor disconnect and breaker, then verify zero voltage with a multimeter.
Access – Remove the unit's electrical service panel to expose the control board.
Document – Photograph every wire and connector position on the board before disconnecting anything.
Remove – Unplug the low-voltage connections, release the board's mounting standoffs or screws, and lift out the old board.
Install – Mount the new Comfort Alert board and reconnect all leads exactly per your photo.
Test – Restore power, place a cooling or heating call, and confirm normal operation and a healthy status LED with no fault codes.

Signs You Need a Replacement

Outdoor unit does not respond to thermostat calls
Erratic, inconsistent, or no diagnostic flash codes
Compressor protection or fault alerts not functioning
Visible burn marks, corrosion, or damaged components 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 Control Board for T4A46...

$128.00

Frequently Asked Questions

Does this Control Board fit my Tempstar T4A460GKD300 – Comfort Alert Diagnostic | Ships Today?

Yes. This is the factory-specified OEM control board for the Tempstar T4A460GKD300 – 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 T4A460GKD300 – 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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