What are the specs for this Control Board?

The correct replacement for ICP model YK048G — 24V Heat Pump Timer | Ships Today is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your ICP equipment which lists the model number YK048G — 24V Heat Pump Timer | Ships Today.

ICP

ICP Defrost Control Board for YK048G — 24V Heat Pump Timer | Ships Today

Name: ICP Defrost Control Board for YK048G — 24V Heat Pump Timer | Ships Today
Brand: ICP
SKU: 34332101
Price: 175.44 USD
Availability: InStock

SKU: 34332101 Brand: ICP

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Overview

The ICP defrost control board (OEM #34332101) is the brain of the defrost cycle on your ICP/Tempstar/Heil YK048G heat pump. It monitors coil temperature and run time, then commands the system into defrost mode to melt frost off the outdoor coil before reversing back to normal heating. When this 24V board fails, the heat pump can ice over, run continuously, fail to switch the reversing valve, or lock out entirely. Symptoms include a frozen outdoor unit in winter, the system never entering or never exiting defrost, auxiliary heat running nonstop, or no 24V output to the contactor and reversing valve. This is a direct OEM replacement that restores factory defrost timing and control logic.

Specifications

Spec	Value
Part Number	34332101
Type	Defrost Control Board
Brand	ICP / Tempstar / Heil
Control Voltage	24V
Application	Heat Pump Defrost
Fitment	OEM Replacement

Compatibility

Engineered for the ICP Tempstar Heil YK048G heat pump and other ICP-family units that originally shipped with OEM defrost board 34332101. Always match your existing board part number and connector layout before installing.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, verify zero voltage with a multimeter.
Access — Remove the outdoor unit control panel cover.
Document — Photograph every wire and terminal on the existing board before disconnecting.
Remove — Label and disconnect the low-voltage and sensor leads, then unclip or unscrew the old defrost board.
Install — Mount the new board, transfer the defrost timer jumper to the same setting, and reconnect each wire per your photo.
Test — Restore power, force a defrost cycle, and confirm the reversing valve and contactor energize correctly.

Signs You Need a Replacement

Outdoor coil ices over and never defrosts in heating mode
Heat pump runs continuously or never exits defrost
No 24V output to the contactor or reversing valve coil
Auxiliary/emergency heat runs constantly, driving up power bills

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

ICP Defrost Control Board for YK...

$175.44

Frequently Asked Questions

Does this Control Board fit my ICP YK048G — 24V Heat Pump Timer | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP YK048G — 24V Heat Pump Timer | Ships Today. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the control board on my ICP YK048G — 24V Heat Pump Timer | Ships Today?

Difficulty: Advanced (1–2 hrs)
Step 1: Turn off breaker. Step 2: PHOTOGRAPH all wire connections before touching anything. Step 3: Label each wire with tape. Step 4: Disconnect all wires, remove old board. Step 5: Mount new board, reconnect all wires matching your photo exactly. Step 6: Restore power and test all modes. Exact part number match is critical.

My HVAC system is completely dead. What could be wrong?

Completely dead HVAC (no LED on board) = failed control board or blown fuse. Check board fuse first (3A or 5A, costs $1–$5). If fuse is good and board has power but no LED, board is dead. Always photograph wiring before replacing.

Is this control board compatible with Bryant or Payne too?

Many ICP parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my ICP control board?

OEM essential. Control boards are model-specific with precise firmware and connector layouts. Aftermarket boards rarely match all functions and can cause intermittent failures or safety issues. Always match the exact OEM part number.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

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