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

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

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

This ambient air temperature sensor utilizes a high-precision NTC thermistor to provide real-time atmospheric data to the primary control board

It fits all standard horizontal instruments but is not compatible with the T-4100 or T-4600 series

Trane SWT2515 Pressure Switch Els PW 17895 This HVAC high-limit safety switchThe 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