Tecumseh K90-97 Overload Relay 320788-704 A failing block switch is

A failing block switch is a frequent cause of safety lockouts

Exceeding these limits may impact sensor accuracy or lead to component failure

This centrifugal fan assembly ensures the pressure switch closes properly

A faulty Lennox 38276 often results in the blower motor failing to start

Tecumseh K90-97 Overload Relay 320788-704 A failing block switch isThe Tecumseh K90 97 Overload Relay is a high precision thermal protection component engineered specifically for hermetic compressors in commercial refrigeration and HVAC systems. As a veteran technician knows, maintaining the integrity of the motor windings is critical; this external overload protector monitors current draw and temperature, safely interrupting the circuit before thermal runaway can damage the internal motor. It is a direct fit for