ClimateMaster 17S0012N12 Controller 320734-701 What causes this limit switch

What causes this limit switch to trip repeatedly

the 025-46044-006 sensor is the serviceable probe component within those larger kits

Enhanced Safety: Equipped with an internal physical interrupter to prevent casing rupture in the event of an electrical fault

For a full blower assembly repair

ClimateMaster 17S0012N12 Controller 320734-701 What causes this limit switchThe ClimateMaster 17S0012N12 circuit board is an OEM electronic control board designed for use in compatible ClimateMaster geothermal and water source heat pump systems. This HVAC control circuit board manages critical system functions including compressor operation, blower sequencing, safety monitoring, and communication between HVAC components to maintain dependable heating and cooling performance. Contractors commonly replace the ClimateMaster