ICP Defrost Control Board for YG042GC1 — Heat Pump | Ships Today
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
Overview
This genuine OEM defrost control board (part number 34332101) is the brain of the ICP / Heil / Tempstar YG042GC1 heat pump's defrost cycle. In heating mode the outdoor coil collects frost; the defrost board monitors the coil temperature sensor and accumulated run time, then periodically reverses the system to melt that ice and protect efficiency. It manages the reversing valve, the defrost timing (typically 30/60/90-minute selectable intervals), the auxiliary/emergency heat handoff, and the compressor anti-short-cycle delay. A failed board is a frequent cause of a heat pump that ices over solid, never defrosts, runs constant electric backup heat, or fails to switch between heating and cooling.
Specifications
| Spec | Value |
|---|---|
| Part Number | 34332101 |
| Type | Defrost Control Board |
| Brand | ICP / Heil / Tempstar |
| Control Voltage | 24 VAC |
| Function | Defrost timing, reversing valve, compressor delay |
| Fitment | OEM Replacement |
Compatibility
Direct OEM fit for the ICP/Heil/Tempstar YG042GC1 heat pump and related Carrier-family outdoor units that originally shipped with defrost board 34332101. Verify the printed part number on your old board before installing.
Installation Guide
- Safety First — Disconnect power at the outdoor disconnect and breaker, then verify zero voltage with a multimeter.
- Access — Remove the control-box service panel on the condenser.
- Document — Photograph every connector and wire on the existing board before unplugging anything.
- Remove — Unplug the harnesses, release the mounting standoffs, and lift out the old board.
- Install — Snap the new board onto the standoffs and reconnect each harness exactly per your photo; match the defrost timing jumper to the original setting.
- Test — Restore power and confirm normal operation, then initiate a forced defrost to verify the cycle.
Signs You Need a Replacement
- Outdoor coil ices over completely and never defrosts in heating mode.
- Unit constantly runs expensive electric backup/emergency heat.
- Reversing valve won't switch, so the system is stuck in heat or cool.
- No display LEDs, erratic relay clicking, or visible burn marks 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