National Comfort Products 14260020 Control Board

The National Comfort Products 14260020 Control Board is a high-reliability heat pump defrost control designed for precise time and temperature defrost cycles. This board is engineered as a pin-for-pin ICM321 equivalent, providing a direct replacement path for standard OEM controls in residential and commercial units. As a veteran-grade HVAC defrost timer, it features adjustable defrost interval settingsù30, 50, or 90 minutesùallowing technicians to fine-tune system performance based on local climate conditions. The integrated test pins facilitate rapid troubleshooting by accelerating the timing sequence 256x, drastically reducing diagnostic time on the roof or in the field.

Built for the rigors of HVACR equipment maintenance, the 14260020 manages outdoor fan operations (rated for 1/2 HP at 240 VAC) and coordinates strip heat and reversing valve signals (1 amp at 24 VAC). By monitoring the liquid line temperature sensor, the board ensures efficient termination and includes an anti-short cycle timer to protect the compressor from rapid cycling damage.

• Universal Compatibility: Direct physical and electrical cross-reference for any ICM321 defrost board application.
• Selectable Logic: Pin-selectable timing intervals of 30, 50, and 90 minutes for customized frost management.
• System Protection: Built-in 5-minute anti-short cycle delay prevents premature compressor wear.
• Service Efficient: On-board test terminals allow for immediate verification of the defrost sequence.
• Industrial Build: Heavy-duty relays rated for reversing valves, auxiliary heat, and high-power fan motors.

How do I verify if the board is initiating a defrost cycle?
Short the 'TEST' pins on the board. This bypasses the logic timer and forces the system into defrost mode, assuming the thermostat is calling for heat. If the outdoor fan stops and the reversing valve shifts, the board is operational.

Can this board be used to replace a Carrier CES0110063-01?
Yes, the 14260020 (ICM321) is a standard replacement for the Carrier CES series and multiple other OEM defrost controls using similar terminal footprints.

What temperature triggers the defrost termination?
Defrost typically terminates when the defrost thermostat (DFT) sense terminal reaches approximately 65?F to 70?F, or when the 10-minute maximum safety interval is reached.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.