Common Questions Can the clock motor and the load operate on different voltages

This is an enclosed relay rated for NEMA 1 environments

allowing the controller to manage superheat and low-pressure safety cutouts with high accuracy

For contractors managing HVAC motor replacement projects

preventing burner operation unless the power venter establishes sufficient draft

Carrier HH18HA166 Limit Switch 322056-301 Common Questions Can the clockThe Carrier HH18HA166 is a critical safety component designed for precise thermal monitoring in residential and light commercial HVAC systems. This 160F CO Auto Limit Switch operates as a primary high limit protection device, featuring a Normally Closed (NC) circuit that opens upon reaching its fixed setpoint of 160F. As a genuine OEM replacement part, it ensures seamless integration with Carrier, Bryant, and Payne furnaces, specifically replacing the