ICP Defrost Control Board for RYMA75N001A 24V Heat Pump | Ships Today

Overview

This OEM defrost control board (part number 1052757) manages the defrost cycle on the ICP RYMA75N001A heat pump. Operating on a 24V control circuit, it monitors outdoor coil temperature and run time, then commands the reversing valve and outdoor fan to clear frost from the coil so the system maintains heating efficiency in cold weather. When this board fails, the unit may ice over, run continuously in defrost, fail to switch out of defrost, or stop heating entirely. Replacing the board restores correct cycle timing and protects the compressor.

Specifications

Compatibility

Direct-fit OEM replacement for the ICP / Tempstar / Heil RYMA75N001A heat pump. The same defrost board is shared across the RYMA75 platform — confirm your existing board carries part number 1052757 before ordering.

Installation Guide

1. Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter.
2. Access — Remove the control panel cover on the outdoor unit.
3. Document — Photograph every wire and connector position before disconnecting anything.
4. Remove — Unplug the low-voltage harnesses, release the board standoffs or screws, and lift out the old defrost board.
5. Install — Seat the new board on the standoffs and reconnect each harness exactly per your photo.
6. Test — Restore power and verify the unit completes a normal heating and defrost cycle.

Signs You Need a Replacement

• Outdoor coil ices over and never clears
• Unit stuck in defrost or cycling defrost too often
• No heating output despite the compressor running
• Defrost LED diagnostic light absent or flashing a fault

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.