What are the specs for this Control Board?

The correct replacement for Tempstar model T2H348GKD200 — Heat Pump Demand Defrost | 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 T2H348GKD200 — Heat Pump Demand Defrost | 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 T2H348GKD200 — Heat Pump Demand Defrost | Ships Today

Name: Tempstar Defrost Control Board for T2H348GKD200 — Heat Pump Demand Defrost | Ships Today
Brand: Tempstar
SKU: 1173636-GEN
Price: 145.00 USD
Availability: InStock

SKU: 1173636-GEN Brand: Tempstar

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Overview

This OEM defrost control board (part number 1173636) governs the defrost cycle on your Tempstar T2H348GKD200 heat pump. It reads outdoor coil temperature and compressor run time, then commands the reversing valve and cuts the outdoor fan to clear frost from the coil during heating. A failed board leaves the unit iced over, stuck in continuous defrost, or unable to defrost at all — each of which slashes heating output and can stress the compressor. The board runs on a 24V control circuit and carries the defrost timing logic, relay, and terminal connections that sequence the unit's heating operation.

Specifications

Spec	Value
Part Number	1173636
Type	Demand / Time-Temperature Defrost Control Board
Brand	Tempstar (ICP / Heil)
Control Voltage	24V
Application	Heat Pump Outdoor Unit
Fitment	OEM Direct Replacement

Compatibility

Direct OEM replacement for the Tempstar T2H348GKD200 heat pump and other ICP-family condensers built under the Tempstar, Heil, Comfortmaker, and Arcoaire brands that use the 1173636 defrost board. Confirm your current board's part number before ordering.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter before touching any wiring.
Access — Remove the control-panel service cover on the condenser cabinet.
Document — Photograph every wire and terminal on the old board before disconnecting.
Remove — Unplug the low-voltage and sensor connectors, release the board's standoffs or screws, and lift it out.
Install — Mount the new 1173636 board and reconnect each wire to the matching terminal using your photos.
Test — Restore power, run a heating cycle, and confirm the unit enters and clears defrost normally.

Signs You Need a Replacement

Outdoor coil ices over and never clears during heating.
Unit is stuck in continuous defrost or rapidly cycles the reversing valve.
No 24V output to the defrost relay or outdoor fan circuit.
Burn marks, swollen relays, or corroded traces visible on the board.

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...

$145.00

Frequently Asked Questions

Does this Control Board fit my Tempstar T2H348GKD200 — Heat Pump Demand Defrost | Ships Today?

Yes. This is the factory-specified OEM control board for the Tempstar T2H348GKD200 — Heat Pump Demand Defrost | 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 T2H348GKD200 — Heat Pump Demand Defrost | 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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