What are the specs for this Control Board?

The correct replacement for Tempstar model T4A324GKN200 — OEM 1177402 | 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 T4A324GKN200 — OEM 1177402 | 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 T4A324GKN200 — OEM 1177402 | Ships Today

Name: Tempstar Comfort Alert Control Board for T4A324GKN200 — OEM 1177402 | Ships Today
Brand: Tempstar
SKU: 1177402-GEN
Price: 144.95 USD
Availability: InStock

SKU: 1177402-GEN Brand: Tempstar

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

Overview

This is a genuine OEM Comfort Alert control board (part number 1177402) for the Tempstar T4A324GKN200 condensing unit. The Comfort Alert module is a compressor diagnostic and protection board that continuously monitors the compressor's electrical signature — voltage, current draw, and run/start behavior — to catch faults before they cause a failure. It flashes coded LED signals for conditions such as locked rotor, open circuit, low/high voltage, short cycling, welded contactor, and missing run capacitor, giving technicians fast, accurate diagnostics. When this board fails you may see no diagnostic LEDs, a compressor that won't start or trips repeatedly, or erratic protective shutdowns. Replacing the board restores the unit's built-in monitoring and helps safeguard the compressor — the most expensive component in the system.

Specifications

Spec	Value
Part Number	1177402
Type	Comfort Alert Diagnostic Control Board
Brand	Tempstar (ICP / Heil family)
Function	Compressor monitoring & fault diagnostics
Control Voltage	24 VAC
Indicators	Coded status LED
Fit	OEM Replacement

Compatibility

Designed as a direct-fit replacement for the Tempstar T4A324GKN200 air conditioner. The 1177402 Comfort Alert board is used across many ICP-built outdoor units (Tempstar, Heil, Comfortmaker, Arcoaire). Verify the existing board's part number and connector layout before ordering.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and breaker, then verify zero voltage with a multimeter.
Access — Remove the electrical access panel on the condensing unit.
Document — Photograph all wiring and connector positions before disconnecting.
Remove — Unplug the low-voltage harness and sense leads, then unsnap or unscrew the board from its standoffs.
Install — Mount the new board, reconnect each harness to the matching terminal per your photo, and seat connectors fully.
Test — Restore power, call for cooling, and confirm the diagnostic LED illuminates and the compressor starts normally.

Signs You Need a Replacement

No status LED or stuck/garbled fault codes
Compressor won't start or short cycles with no clear cause
Random nuisance protective shutdowns
Board shows burnt traces, swollen components, or corrosion

Shipping & Returns

Ships same day on orders placed before 3 PM CST. 30-day hassle-free 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...

$144.95

Frequently Asked Questions

Does this Control Board fit my Tempstar T4A324GKN200 — OEM 1177402 | Ships Today?

Yes. This is the factory-specified OEM control board for the Tempstar T4A324GKN200 — OEM 1177402 | 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 T4A324GKN200 — OEM 1177402 | 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.

Menu