Tempstar Defrost Control Board for TCH460AKA1 — OEM 1086070 | Ships Today
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
Overview
This is a genuine OEM defrost control board (part number 1086070) for the Tempstar TCH460AKA1 heat pump. The defrost board monitors outdoor coil temperature and run time, then initiates and terminates the defrost cycle that clears frost and ice from the outdoor coil in cold weather. It coordinates the reversing valve, condenser fan, and auxiliary heat during defrost. When the board fails, the heat pump may ice over and lose heating capacity, run defrost too often or never, leave the outdoor fan off during defrost, or fail to bring on supplemental heat. Symptoms often appear only in winter, which can make a failing defrost board easy to miss until the coil is fully frozen.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1086070 |
| Description | Defrost Control Board |
| Type | Defrost Timer / Control Board |
| Brand | Tempstar (ICP / Heil) |
| Control Voltage | 24 VAC |
| Fits Model | TCH460AKA1 |
| Fitment | OEM Direct Replacement |
Compatibility
Direct OEM replacement for the Tempstar TCH460AKA1 heat pump and other ICP-family outdoor units (Heil, Comfortmaker, Arcoaire) that use the 1086070 defrost control board. Confirm the part number and connector layout against your existing board before installing.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage at the board terminals with a multimeter.
- Access — Remove the condenser control-panel cover to expose the defrost board and its wiring harness.
- Document — Photograph every plug, terminal, and the defrost timing/jumper settings before disconnecting anything.
- Remove — Unplug the connectors, disconnect the defrost sensor lead, and unscrew or unclip the old board from its standoffs.
- Install — Mount the new board, reconnect all harness plugs and the defrost sensor, and set the defrost timing jumper to match the original.
- Test — Restore power, run the unit in heating, and verify a proper forced or timed defrost cycle.
Signs You Need a Replacement
- Outdoor coil ices over and the heat pump loses heating capacity
- Defrost cycle never runs, or runs constantly
- Outdoor fan or reversing valve behaves incorrectly during defrost
- No 24V output to controlled components or visibly burned board traces/relays
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