Rheem-Ruud 42-100491-09 Start Relay High-Millivolt Output: Designed to provide

High-Millivolt Output: Designed to provide a consistent signal to the safety shut-off valve

Complete Internal Overhaul: Includes (1) rubber ball

Always verify there is no ground fault before installing the new unit

40" WC setpoint

Rheem-Ruud 42-100491-09 Start Relay High-Millivolt Output: Designed to provideThe Rheem Ruud 42 100491 09 is a high performance potential start relay designed for single phase compressor motors in residential and commercial HVAC units. This technical component functions as a compressor start relay by utilizing back EMF to precisely disconnect the start capacitor once the motor reaches approximately 75% to 80% of its rated speed. Engineered for reliability under high torque conditions, the 42 100491 09 start relay ensures the