If the compressor won't start but you have 24V at the coil

This HVAC high-limit safety switch utilizes a 3-inch probe insert for precise sensing of the plenum or trunk air temperature

Technicians often see the blower fan running continuously or the furnace short-cycling (shutting down before the thermostat set-point is reached)

this OEM assembly simplifies repairs by combining the starting relay and motor protector into a single 103N-style housing

and terminal blocks located in high-heat areas of the combustion chamber or heat exchanger area

Trane SWT2515 Pressure Switch Els PW 17895 If the compressor won't startThe Trane SWT2515 is a high precision HVAC pressure switch calibrated to a 1. 36" WC setpoint for critical safety monitoring in gas furnaces and air handlers. This SPST (Single Pole Single Throw) air pressure sensor acts as a primary safety interlock, ensuring the draft inducer motor generates sufficient negative pressure before the ignition sequence begins. Designed for maximum reliability in high cycle environments, the SWT2515 provides a 1 4" barb