Electronic Air Handler Defrost Controller
This controller automatically manages defrost cycles in air handlers and refrigeration evaporators by sensing coil temperature and timing defrost to prevent ice buildup. It qualifies for HTS 9032.89.6025 as a specialized automatic control for refrigeration and heating systems. Used in cold storage and HVAC applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for thermostat-only function without defrost cycle regulation
Simple thermostats are specifically provided for in 9032.10.
If part of industrial refrigeration machinery
Machines for temperature change not elsewhere specified go to 8479.
If generic parts not principally for Chapter 90 apparatus
Residual heading for parts per Chapter 90 note 2(c).
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Import Tips & Compliance
• Include wiring diagrams and sensor specifications in documentation
• Ensure labeling indicates compatibility with specific refrigerants (e.g
• R-404A)
• Avoid classifying as timers (9107); highlight temperature-based automatic control
Related Products under HTS 9032.89.60.25
Chiller Water Temperature Controller
Automatically controls chilled water temperature in commercial HVAC chiller plants by modulating valves and pumps based on supply/return temperature differentials. Classified in HTS 9032.89.6025 for regulating air conditioning system parameters. Used in large building cooling systems.
Zone Heating Valve Controller
Automatically actuates hydronic heating zone valves based on room thermostat demands and boiler status for multi-zone heating systems. Falls under HTS 9032.89.6025 as heating system control apparatus. Common in radiant floor heating installations.
Air Conditioning Economizer Controller
Monitors outdoor air conditions to automatically enable free cooling economizers in rooftop HVAC units when conditions permit, reducing mechanical cooling load. HTS 9032.89.6025 for air conditioning control instruments. Energy-saving feature for commercial buildings.
Digital Thermostat Controller for HVAC Systems
This digital thermostat automatically regulates temperature in air conditioning and heating systems by monitoring ambient conditions and adjusting output to maintain setpoints. It falls under HTS 9032.89.6025 as a control instrument specifically for air conditioning, refrigeration, or heating systems, distinct from general automatic regulators. Designed for residential and commercial HVAC installations.
Refrigeration Pressure Switch Controller
An automatic pressure switch that controls compressor operation in refrigeration systems by monitoring refrigerant pressure and cycling on/off to prevent overload. Classified under HTS 9032.89.6025 for its role in regulating refrigeration systems through automatic pressure control. Commonly used in commercial walk-in coolers.
Variable Frequency Drive for HVAC Fans
A VFD that automatically regulates motor speed in HVAC blower fans based on demand signals from temperature sensors, optimizing energy use in air conditioning systems. Falls under HTS 9032.89.6025 for automatic control of air conditioning parameters. Essential for modern variable air volume systems.