Tempstar Defrost Control Board for T2H360GKD100 — Heat Pump | Ships Today
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Overview
This genuine OEM defrost control board (part number 1173636) is the logic center of the Tempstar T2H360GKD100 heat pump's outdoor section. In heating mode it monitors coil temperature and run time, then commands a defrost cycle — reversing the system and shutting off the outdoor fan to melt frost off the outdoor coil — before returning to normal heating. It also coordinates the reversing valve, condenser fan, and compressor timing. When this board fails, the outdoor coil ices over solid, heating capacity drops, the unit may run constantly, or it may never enter defrost at all. Other symptoms include the outdoor fan behaving erratically, no compressor operation, or the reversing valve failing to shift. A failed defrost board is a frequent cause of winter no-heat and frozen-coil complaints.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1173636 |
| Type | Defrost Control Board |
| Brand | Tempstar (ICP / Heil) |
| Control Voltage | 24V |
| Function | Defrost timing, fan & reversing-valve control |
| Fit | OEM direct replacement |
Compatibility
Engineered as a direct-fit replacement for the Tempstar T2H360GKD100 heat pump and equivalent ICP, Heil, and Comfortmaker units sharing the same outdoor control platform. Match the board's part number and connector layout to your original before installing.
Installation Guide
- Safety First — Disconnect outdoor power and verify zero voltage with a multimeter before touching the board.
- Access — Remove the electrical-compartment service panel to expose the control board.
- Document — Photograph every wire harness, sensor lead, and the defrost timing-pin setting before disconnecting.
- Remove — Unplug each connector, release the board's standoffs or screws, and lift the old board out.
- Install — Seat the new board, set the defrost interval pins to match the original, and reconnect every harness per your photos.
- Test — Restore power, confirm normal heating operation, and verify a forced/initiated defrost cycle runs and terminates correctly.
Signs You Need a Replacement
- Outdoor coil ices over and never defrosts.
- Heat pump runs constantly or won't produce heat.
- Outdoor fan or reversing valve behaves erratically.
- No compressor operation despite a heating call.
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