What are the specs for this Control Board?

The correct replacement for Tempstar model T4H360GKD300 — OEM | 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 T4H360GKD300 — OEM | 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 Defrost Control Board for T4H360GKD300 — OEM | Ships Today

Name: Tempstar Defrost Control Board for T4H360GKD300 — OEM | Ships Today
Brand: Tempstar
SKU: 1173636-GEN
Price: 169.00 USD
Availability: InStock

SKU: 1173636-GEN Brand: Tempstar

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Overview

This is a genuine OEM defrost control board (part number 1173636) for the Tempstar T4H360GKD300 heat pump. The defrost board is the brain of the outdoor unit in heating mode: it monitors coil temperature and run time, energizes the reversing valve and auxiliary heat, and periodically reverses the system to melt frost off the outdoor coil. When the board fails, the heat pump can ice over solid, get stuck in a permanent defrost cycle, fail to energize the compressor or fan, or lose communication with the thermostat. Because it controls both the changeover and the defrost timing, a bad board often presents as intermittent, hard-to-diagnose heating faults.

Specifications

Spec	Value
Part Number	1173636
Type	Defrost Control Board
Brand	Tempstar
Application	Heat pump defrost / changeover control
Fit	OEM direct replacement

Compatibility

Built as a direct-fit replacement for the Tempstar T4H360GKD300 and equivalent Heil, Comfortmaker, and ICP-platform heat pumps using the same OEM part number. Match the board's connector layout and part number to your original before installing, as defrost boards are model-specific.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter before servicing.
Access — Remove the outdoor electrical access panel to expose the control board.
Document — Photograph every harness plug, sensor lead, and terminal connection before unplugging anything.
Remove — Unplug each connector, release the board standoffs or screws, and lift out the old board.
Install — Seat the new board on its standoffs and reconnect every harness and sensor exactly per your photo.
Test — Restore power, confirm the board powers up, and verify the unit heats and completes a normal defrost cycle.

Signs You Need a Replacement

Outdoor coil ices over and never defrosts
Unit stuck in continuous defrost or never enters defrost
No compressor or fan output despite a valid heat call
Board shows no power, blown components, or burnt connectors

Shipping & Returns

Ships same day for orders placed before 3 PM CST. 30-day returns on unused parts. 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 Defrost Control Board f...

$169.00

Frequently Asked Questions

Does this Control Board fit my Tempstar T4H360GKD300 — OEM | Ships Today?

Yes. This is the factory-specified OEM control board for the Tempstar T4H360GKD300 — OEM | 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 T4H360GKD300 — OEM | 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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