What are the specs for this Control Board?

The correct replacement for Tempstar model T4H548GKD200 — OEM Heat Pump Board | 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 T4H548GKD200 — OEM Heat Pump Board | 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 T4H548GKD200 — OEM Heat Pump Board | Ships Today

Name: Tempstar Defrost Control Board for T4H548GKD200 — OEM Heat Pump Board | Ships Today
Brand: Tempstar
SKU: 1173636-GEN
Price: 129.95 USD
Availability: InStock

SKU: 1173636-GEN Brand: Tempstar

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Overview

This OEM defrost control board (part #1173636) is the brain of the defrost cycle on your Tempstar T4H548GKD200 heat pump. It monitors coil temperature and run time, then initiates and terminates defrost to keep the outdoor coil clear of frost during heating operation. It also coordinates the reversing valve, auxiliary heat, and fan timing. When this board fails, the unit may ice over in heating mode, fail to switch into defrost, run defrost too often, or lose heat-pump operation entirely.

Specifications

Spec	Value
Part Number	1173636
Type	Defrost Control Board
Brand	Tempstar
Control Voltage	24V
Function	Heat Pump Defrost Timing & Sequencing

Compatibility

Direct OEM fit for the Tempstar T4H548GKD200 heat pump. Commonly shared across ICP-family (Heil, Comfortmaker, Tempstar) heat pumps that specify defrost board #1173636. Confirm the part number printed on your existing board before ordering.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
Access — Remove the outdoor unit's electrical service panel.
Document — Photograph every wire and the defrost timing/pin-select jumper positions before disconnecting.
Remove — Unplug the harness connectors and unscrew the old board from its standoffs.
Install — Mount the new board, set the defrost timing jumper to match the original, and reconnect each connector per your photo.
Test — Restore power, run a heating call, and confirm normal operation and a proper forced/timed defrost cycle.

Signs You Need a Replacement

Outdoor coil ices up heavily and never goes into defrost.
Unit gets stuck in defrost or defrosts far too frequently.
No heat-pump heating despite the compressor running.
Erratic reversing-valve or auxiliary-heat behavior.

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 Defrost Control Board f...

$129.95

Frequently Asked Questions

Does this Control Board fit my Tempstar T4H548GKD200 — OEM Heat Pump Board | Ships Today?

Yes. This is the factory-specified OEM control board for the Tempstar T4H548GKD200 — OEM Heat Pump Board | 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 T4H548GKD200 — OEM Heat Pump Board | 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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