ICP Defrost Control Board for RYMA10N001A — Heat Pump Timer Board | Ships Today
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
Overview
This OEM defrost control board (part 1052757) is the brain of the defrost cycle on your ICP / Heil / Tempstar RYMA10N001A heat pump. It monitors coil temperature and elapsed run time, then commands the reversing valve and shuts off the outdoor fan to melt frost from the outdoor coil during heating season. When the board fails, the unit can ice over in heating mode, run an endless defrost, never defrost at all, or lose compressor/fan control entirely. Common failure symptoms include a frozen outdoor coil, the system stuck blowing cold air during a heat call, blown control fuses, scorched relays on the board, or no response from the outdoor unit.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1052757 |
| Type | Defrost Control Board |
| Brand | ICP (Heil / Tempstar) |
| Control Voltage | 24V |
| Function | Defrost timing, reversing valve & fan control |
| Fit | OEM Replacement |
Compatibility
Built for the ICP / Heil / Tempstar / Comfortmaker RYMA10N001A heat pump and shared-platform outdoor units that use the same defrost control. Confirm the OEM number and connector layout against your existing board before installing.
Installation Guide
- Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before opening the control box.
- Access — Remove the outdoor unit's electrical service panel.
- Document — Photograph every plug, sensor lead, and terminal on the existing board.
- Remove — Unplug the harnesses, release the standoffs/screws, and lift out the old board.
- Install — Seat the new board on its standoffs and reconnect each harness exactly per your photo, including the defrost thermostat/sensor.
- Test — Restore power, force a defrost test cycle, and confirm proper reversing-valve and fan operation.
Signs You Need a Replacement
- Outdoor coil freezes solid in heating mode
- Unit never enters defrost or stays in defrost continuously
- System blows cold air during a heat call
- Burnt relays, scorch marks, or no output from 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