The robust construction allows it to withstand the thermal stress of repeated heating cycles in both residential and light commercial HVAC applications

1 seconds to 100 hours for diverse HVAC timing control requirements

It is the direct official replacement for the discontinued Aaon OE392-10

A technician can verify the switch using a multimeter to check for continuity across the terminals when the system is cool

Common Questions: How do I know if I need a new pilot assembly

Aprilaire 4740 Relay 320734-701 The robust construction allows itThe Aprilaire 4740 Relay is a critical replacement component engineered specifically for Aprilaire 700 series humidifiers, including the 700A and 700M models manufactured after 2008. As a genuine AprilAire humidifier part, this fan relay is responsible for powering the circulator fan when the humidistat signals for moisture. Unlike older "Series One" versions that utilized the 4238 control board with an integrated transformer, this modern 24V