allowing for remote sensing and flexible installation in walk-in coolers or commercial HVAC units

Its robust construction supports operational stability across a wide temperature range

Versatile Signal Input: Industry-standard 4-20mA and 0-10VDC support ensures the board interfaces with virtually any modern system controller

Key Benefits Precise Metering: Specifically calibrated for 3-ton R-410A systems to maximize evaporator coil heat transfer

it ensures a fail-safe position upon power loss

Carrier HH18HA126 Limit Switch 321042-401 allowing for remote sensing andThe Carrier HH18HA126 Limit Switch is a critical safety component designed for precise thermal regulation in residential and commercial HVAC systems. Engineered as a 90 125F auto limit switch, this OEM replacement part monitors internal heat levels to prevent heat exchanger damage. When the system detects temperatures exceeding the 125F threshold, the switch opens the electrical circuit, effectively shutting down the heating cycle to maintain