Is a check valve required with this installation

35" WC (water column) setpoint

the contacts are likely welded shut

this manual reset thermal switch is specifically designed for air intake or burner door monitoring

The Watts 0780328

Secop Diversitech 117U5373 Start Capacitor R-448A Is a check valve requiredWhen you're dealing with a single phase compressor motor thats struggling to kick over, the Secop Diversitech 117U5373 Start Capacitor is the reliable fix for increasing starting torque. This 80 Microfarad component is specifically engineered for high demand HVACR applications, providing the necessary high amperage surge to overcome initial mechanical resistance. Rated at 260V and designed with a standard round profile, it is a drop in HVAC compressor