The Resideo L4029E1029 Limit Control is a fixed manual reset temperature control device that provides high limit cutout safety in warm air or air conditioning systems. This control is particularly critical for the smooth running of the system. For an efficient and reliable HVAC system, the Resideo Limit Control manual reset is a great choice for optimal system performance. https://www.partshnc.com/l4029e1029-resideo-limit-200f-mr-openrise