1 seconds to 100 hours for diverse HVAC timing control requirements

Set your multimeter to DC microamps (µA)

Does this valve come with the solenoid coil included

The paddle-style design minimizes pressure drop while providing a quick-opening flow characteristic

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

Aprilaire 4740 Relay 320734-701 1 seconds to 100 hoursThe 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