Antunes 8742020074 Dual Fan and Limit Control 24VAC with 10' Sensor

The Antunes 8742020074 is a dual function control that combines a single speed fan controller and a warm air high limit control into one compact unit. This versatile control is designed for HVAC applications where both blower operation and high temperature safety protection are required.

Key Features:

• Fan control range: 80-120°F with adjustable potentiometer
• High limit control range: 150-235°F for overheat protection
• 24VAC operation with two SPST control relays
• 10-foot thermistor sensor with capillary for remote temperature sensing
• Front panel LED indicators for fan status monitoring
• Adjustable hysteresis control to prevent short cycling
• PCB-mounted relays for reliable switching operation

The fan relay activates based on temperature sensed by the thermistor, automatically controlling blower operation to maintain optimal temperature. The independent high limit relay provides critical overheat protection by opening the circuit when temperatures exceed the safe operating range. This dual-function design eliminates the need for separate controls, reducing installation complexity and cost in furnaces, heaters, and other warm air heating systems.