ICP Defrost Control Board for YJ018GA3 — Heat Pump Defrost Timer 1069364 | Ships Today
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Overview
This is a genuine OEM defrost control board (part number 1069364) for the ICP/Tempstar/Heil YJ018GA3 heat pump. The defrost board is the brain of the heat pump's defrost cycle: it monitors the outdoor coil temperature and compressor run time, then initiates a timed or demand defrost to clear ice from the outdoor coil during heating operation. It coordinates the reversing valve, outdoor fan motor, and supplemental heat to safely melt frost without overcooling the home. When this board fails, the heat pump can ice over solid, run constantly with poor heat output, or lock out entirely. Common failure causes include voltage spikes, corroded relays, burnt traces, and failed timing logic. This board operates on 24V control voltage and uses the standard defrost timer pin selections found across the ICP family.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1069364 |
| Type | Defrost Control Board |
| Brand | ICP / Tempstar / Heil |
| Control Voltage | 24V |
| Application | Heat Pump Defrost Control |
| Fit | OEM Direct Replacement |
Compatibility
Engineered as a direct OEM replacement for the ICP/Tempstar/Heil YJ018GA3 heat pump condensing unit, and shared across many ICP-family heat pumps that originally used board 1069364. Always confirm the printed part number on your existing board before ordering.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter at the board's line terminals.
- Access — Remove the outdoor unit's control panel access cover.
- Document — Photograph every wire and the defrost timing pin position before disconnecting anything.
- Remove — Label and unplug the low-voltage and line connectors, then unscrew the old board from its standoffs.
- Install — Mount the new 1069364 board, set the defrost timer pin to match the original, and reconnect every wire per your photo.
- Test — Restore power and force a defrost cycle to confirm the reversing valve, fan shutdown, and timing all respond correctly.
Signs You Need a Replacement
- Outdoor coil ices over and never clears during heating.
- Heat pump won't enter or exit defrost, or defrosts far too often.
- No 24V output to the reversing valve or outdoor fan during the cycle.
- Visible burnt relays, scorched traces, or a board that won't power up.
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