Tempstar Defrost Control Board for TCH236AKA1 — OEM 1086070 | Ships Today
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Overview
This is a genuine OEM defrost control board (part number 1086070) for the Tempstar TCH236AKA1 heat pump. The defrost control board is the brain of the outdoor unit's defrost cycle — it monitors coil temperature and run time, then initiates and terminates defrost so frost and ice do not build up on the outdoor coil during heating operation. It also coordinates the reversing valve, compressor contactor, and auxiliary heat staging. When this board fails, the heat pump can ice over, lose heating capacity, run the defrost cycle too often or not at all, or fail to energize the compressor entirely. Replacing the board with the correct OEM unit restores reliable defrost timing and protects the compressor from liquid slugging.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1086070 |
| Type | Defrost Control Board |
| Brand | Tempstar (ICP / Heil) |
| Fits Model | TCH236AKA1 |
| Application | Heat Pump Outdoor Unit |
| Fit | OEM Direct Replacement |
Compatibility
Engineered as a direct replacement for the Tempstar TCH236AKA1 heat pump. Because ICP, Heil, Tempstar, and Comfortmaker share platforms, this board may also service equivalent models built on the same chassis — always confirm the OEM part number 1086070 on your existing board before ordering.
Installation Guide
- Safety First — Disconnect power at the outdoor disconnect and breaker, then verify zero voltage with a multimeter before touching any wiring.
- Access — Remove the outdoor unit's control-access service panel.
- Document — Photograph every wire and terminal connection on the existing board before disconnecting anything.
- Remove — Label and unplug the low-voltage and line-voltage connectors, then unscrew the failed board from its standoffs.
- Install — Mount the new board on the standoffs and reconnect each wire exactly as documented in your photos.
- Test — Restore power, run a heating call, and confirm the unit initiates and terminates defrost correctly.
Signs You Need a Replacement
- Outdoor coil ices up and never clears during heating mode.
- Heat pump runs continuous or excessively frequent defrost cycles.
- Compressor or reversing valve will not energize on a heating call.
- Visible burn marks, corrosion, or scorched relays 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