Tempstar Defrost Control Board for TXH530GKA200 — OEM 1173636 | Ships Today
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Overview
This is the OEM defrost control board (part number 1173636) for the Tempstar TXH530GKA200 heat pump. The defrost control board is the brain of the outdoor unit's heat-pump operation — it monitors coil temperature and run time, energizes the reversing valve, and initiates a timed or demand defrost cycle to clear frost from the outdoor coil during heating mode. It also manages the contactor coil, fan delay, and 24V signaling between the indoor and outdoor sections. When this board fails, the unit can ice over, fail to switch between heating and cooling, short-cycle, or stop running entirely.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1173636 |
| Type | Defrost Control Board |
| Brand | Tempstar (ICP / Heil) |
| Control Voltage | 24V |
| Application | Heat Pump — Outdoor Unit |
| Fit | OEM Exact Replacement |
Compatibility
Direct fit for the Tempstar TXH530GKA200 heat pump and other ICP-family condensers (Tempstar, Heil, Comfortmaker, Arcoaire) that originally shipped with board 1173636. Always verify the number printed on your existing board before ordering.
Installation Guide
- Safety First — Disconnect power at the outdoor disconnect and breaker, then verify zero voltage at the board with a multimeter.
- Access — Remove the control-panel service cover on the outdoor unit.
- Document — Photograph every wire and terminal location before disconnecting anything.
- Remove — Label and unplug the low-voltage harness and line connections, then unsnap or unscrew the old defrost board from its standoffs.
- Install — Mount the new 1173636 board and reconnect each wire exactly per your photo, confirming the defrost-timer jumper matches the original setting.
- Test — Restore power and verify the unit runs in heating and cooling and that the reversing valve energizes on demand.
Signs You Need a Replacement
- Outdoor coil ices over and never defrosts in heating mode
- Unit will not switch between heating and cooling
- Contactor or reversing valve fails to energize
- Burnt smell, scorch marks, or visible damage 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