What are the specs for this Control Board?

The correct replacement for Tempstar model T4H336GKA100 Heat Pump | 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 T4H336GKA100 Heat Pump | 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 T4H336GKA100 Heat Pump | Ships Today

Name: Tempstar Defrost Control Board for T4H336GKA100 Heat Pump | Ships Today
Brand: Tempstar
SKU: 1173636-GEN
Price: 139.00 USD
Availability: InStock

SKU: 1173636-GEN Brand: Tempstar

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Overview

This genuine OEM defrost control board (part 1173636) manages the defrost cycle on the Tempstar T4H336GKA100 heat pump. In heating mode the outdoor coil accumulates frost; the defrost board uses time and temperature input (from the defrost thermostat/sensor) to periodically reverse the system, energize the reversing valve, and melt the ice off the outdoor coil. It also controls the contactor and outdoor fan during defrost. A failed board can leave the outdoor coil iced over, cause the unit to never defrost, or trigger constant defrosting that kills efficiency.

Specifications

Spec	Value
Part Number	1173636
Type	Defrost Control Board
Brand	Tempstar (ICP / Heil)
Control Voltage	24V
Application	Heat Pump Outdoor Unit
Fit	OEM Replacement

Compatibility

Direct OEM replacement for the Tempstar T4H336GKA100 heat pump. Defrost boards are model-specific in their timing logic and connector layout — confirm part number 1173636 against your unit before ordering.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker; verify zero voltage with a multimeter.
Access — Remove the outdoor unit electrical panel.
Document — Photograph every harness connection and the defrost-time jumper/pin setting before disconnecting.
Remove — Unplug each connector and remove the board's mounting screws/standoffs.
Install — Mount the new board, set the defrost timing pins to match the old board, and reconnect every harness per your photo.
Test — Restore power and verify normal heating operation; initiate a forced defrost (per the board's test pins) to confirm the cycle works.

Signs You Need a Replacement

Outdoor coil ices over and never defrosts in heating mode
Unit defrosts constantly or at the wrong intervals
No output to the reversing valve, contactor, or fan during defrost
Board shows scorched components or a blank/dead diagnostic LED

Shipping & Returns

Ships same day on orders placed 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 Defrost Control Board f...

$139.00

Frequently Asked Questions

Does this Control Board fit my Tempstar T4H336GKA100 Heat Pump | Ships Today?

Yes. This is the factory-specified OEM control board for the Tempstar T4H336GKA100 Heat Pump | 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 T4H336GKA100 Heat Pump | 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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