SRV230-1290 Replacement High Limit Switch Snap Disc #3 for Heatilator Eco-Choice PS35, PS50, CAB50, ECO-NZ-PS35 Pellet Stoves. Limit Switch for Quadrafire Pellet Stoves: Edge 60, MT Vernon - 2003 to 2006 & AE - 2006 to 2019 & E2 - 2014 to 2018, MTV-E2-C - 2017 to 2018, Mt Vernon AE Insert, Contour, Santa-Fe-C - 2019 to Present, Santa-Fe-MBK - 2009 to 2019, Classic Bay 1200i Insert, CB1200-C - 2019 to Present, CB1200M-MBK - 2009 to 2019, Castile-FS-B - 2009 to 2019, Castile-C - 2019 to Present, Castile Insert-C - 2019 to Present, Trekker Insert. SRV230-1290 switch is normally closed. this snap disc will detect the heat rise above 250°F and close the main power circuit, turn power off to the entire stove. This switch must be manually reset to restore power and resume operation. 16A @250V Allows high-power loads to operate continuously, and better reliability ensures safe operation of equipment one year warranty