Carrier 38CQ660029 Defrost Relay 321702-401 Operating at 208 Volts

Operating at 208 Volts

Direct Swap Compatibility: Engineered as a drop-in replacement head mechanism for McDonnell & Miller Series 93 and 193 controls

This switch is typically calibrated for high-pressure cut-out

ensuring optimal evaporator efficiency and compressor protection

or 240V) and purchase a compatible AM or ASC2 coil separately

Carrier 38CQ660029 Defrost Relay 321702-401 Operating at 208 VoltsThe Carrier 38CQ660029 Defrost Relay is a specialized HVAC defrost control board designed for heat pump systems requiring precise field selectable timing. This genuine OEM replacement part manages the transition between heating and defrost modes by monitoring the defrost thermostat and cumulative compressor run time. Engineered for 208 240V configurations, the board supports a 10A current capacity and features adjustable intervals of 30, 45, or 90