The A25 warm air control locks out on a temperature increase to the control set point. Manual reset is required before the electrical contacts can be reclosed. The A25 is normally located in a return air duct and is wired to shut down air conditioning or ventilating fans when the temperature of the air becomes excessively hot.Features: trip-free reset lever does not permit restarting until the reset lever is manually releasedthe rod and tube type sensing element provides positive control action Product Specifications BRANDJohnson Controls TEMPERATURE CONTROL RANGE °F25 to 215 RANGE ADJUSTERConcealed Screwdriver Slot SWITCH ACTIONSPDT DIAL STOPHigh Limit Set at 125°F (52°C) LIMITED WARRANTY YEARS1