How do I check if my 24V coil is functioning

What systems use this specific Nordyne control board

this SPDT contactor delivers the electrical integrity required to maintain consistent airflow and safety logic in Reznor heating systems

calibrated to trigger at a 410 PSIG cut-out

but for small motors and specific York control boards

Carrier HK02ZB028 Pressure Switch Els PW 17895 How do I check ifThe Carrier HK02ZB028 Pressure Switch is a critical safety component designed for precise HVAC low pressure cutout protection in residential and commercial Carrier, Bryant, and Payne systems. As a genuine OEM replacement part, it ensures the compressor is protected from damage caused by loss of charge or low ambient temperatures. This switch is factory calibrated with a 27 psi open and 60 psi close set point, facilitating an automatic reset once