Temporarily jumping the switch is only for diagnostic purposes by a licensed technician

mechanical linkage

This spring is specifically designed for the Maxitrol RV91 (including RV91-2 and RV91-2-1/2) and 210E series regulators

ensuring reliable terminal alignment and mounting

White-Rodgers 90-380 Relay Temporarily jumping the switch isThe White Rodgers 90 380 is a heavy duty, 24V enclosed fan relay designed for demanding HVAC switching applications. This Type 184 relay features a SPNO SPNC (Single Pole Normally Open Normally Closed) contact configuration, allowing for versatile control of fan motors, solenoids, and heating cooling circuits. Engineered for continuous duty, it operates reliably at a coil voltage of 24 VAC (50 60 Hz) and provides 1 4" quick connect terminals for