What are the specs for this Control Board?

The correct replacement for Tempstar model T4A460GKD100 — ComfortAlert 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 T4A460GKD100 — ComfortAlert 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 Control Board for T4A460GKD100 — ComfortAlert Diagnostic Module | Ships Today

Name: Tempstar Control Board for T4A460GKD100 — ComfortAlert Diagnostic Module | Ships Today
Brand: Tempstar
SKU: 1177402-GEN
Price: 149.00 USD
Availability: InStock

SKU: 1177402-GEN Brand: Tempstar

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Overview

This is the genuine OEM ComfortAlert control board (part number 1177402) for the Tempstar T4A460GKD100 condensing unit. The ComfortAlert diagnostic module continuously monitors the compressor and system electrical operation, detecting faults such as locked rotor, open circuits, low voltage, and short cycling before they cause catastrophic compressor failure. When this board fails, the unit may stop cooling entirely, refuse to start, trip on faults, or flash diagnostic LED codes that no longer correspond to actual conditions. Replacing a failed board with the exact OEM part restores accurate fault reporting and protects your compressor investment.

Specifications

Spec	Value
Part Number	1177402
Type	ComfortAlert Diagnostic Control Board
Brand	Tempstar (ICP / Heil)
Function	Compressor & system fault monitoring
Control Voltage	24V
Fits Model	T4A460GKD100

Compatibility

Designed as a direct-fit replacement for the Tempstar T4A460GKD100 air conditioner. This board is shared across many ICP-family condensing units (Tempstar, Heil, ICP, Comfortmaker) of the same series. Always confirm the printed part number 1177402 against your existing board before installing.

Installation Guide

Safety First — Disconnect power at the breaker and the outdoor disconnect, then verify zero voltage with a multimeter.
Access — Remove the control-box service panel on the condensing unit.
Document — Photograph all wiring and connector positions before disconnecting anything.
Remove — Unplug the low-voltage and sensing connectors, release the board standoffs or mounting screws, and lift out the old board.
Install — Seat the new board on its mounts and reconnect every harness exactly as photographed.
Test — Restore power, allow the module to initialize, and confirm normal operation with no fault codes flashing.

Signs You Need a Replacement

Unit will not start or randomly stops cooling
Persistent or nonsensical diagnostic LED fault codes
Compressor short-cycling or nuisance trips
No response to thermostat calls despite good 24V signal

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...

$149.00

Frequently Asked Questions

Does this Control Board fit my Tempstar T4A460GKD100 — ComfortAlert Diagnostic Module | Ships Today?

Yes. This is the factory-specified OEM control board for the Tempstar T4A460GKD100 — ComfortAlert 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 T4A460GKD100 — ComfortAlert 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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