What are the specs for this Control Board?

The correct replacement for Tempstar model T4H336GKE100 — 24V 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 T4H336GKE100 — 24V 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 T4H336GKE100 — 24V Heat Pump | Ships Today

Name: Tempstar Defrost Control Board for T4H336GKE100 — 24V Heat Pump | Ships Today
Brand: Tempstar
SKU: 1173636-GEN
Price: 149.95 USD
Availability: InStock

SKU: 1173636-GEN Brand: Tempstar

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Overview

This genuine OEM defrost control board (Part No. 1173636) is the brain of the defrost cycle on the Tempstar T4H336GKE100 heat pump. During heating, frost builds on the outdoor coil and reduces efficiency; the defrost board monitors the defrost thermostat and a timed interval, then reverses the cycle to melt the ice while energizing auxiliary heat. It also coordinates the reversing valve, compressor contactor, and condenser fan relays. When this board fails the system may run constant defrost, never defrost at all, freeze the outdoor coil solid, short-cycle, or stop heating entirely. Replacing a failed board restores correct defrost timing and protects the compressor from liquid slugging.

Specifications

Spec	Value
Part Number	1173636
Type	Defrost Control Board
Brand	Tempstar
Control Voltage	24 VAC
Application	Heat Pump Outdoor Unit
Fit	OEM Replacement

Compatibility

Designed for the Tempstar T4H336GKE100 heat pump and the matching ICP / Heil / Comfortmaker condensers that specify defrost board 1173636. Confirm the board part number and connector layout against your existing board before installing.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter before touching the board.
Access — Remove the condenser electrical panel to reach the control board.
Document — Photograph every plug, wire color, and terminal on the old board before disconnecting.
Remove — Unplug the harness connectors and low-voltage leads, then release the board from its standoffs or screws.
Install — Seat the new board on the same standoffs and reconnect each connector to its matching position per your photo.
Test — Restore power, run a heating cycle, and verify normal operation and a correct defrost cycle (forced defrost if needed).

Signs You Need a Replacement

Outdoor coil ices over and never clears during heating.
Unit runs in constant or excessively frequent defrost.
No heating output or the reversing valve fails to switch on defrost.
Visible burnt components, scorch marks, or corrosion on the board.

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...

$149.95

Frequently Asked Questions

Does this Control Board fit my Tempstar T4H336GKE100 — 24V Heat Pump | Ships Today?

Yes. This is the factory-specified OEM control board for the Tempstar T4H336GKE100 — 24V 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 T4H336GKE100 — 24V 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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