As a high-limit switch

Standard 3/4" NPT Threading: Fits the boiler manufacturer's tapping for temperature limit controls on most residential and commercial hydronic systems

This Lennox blower limit switch features an automatic reset

Precision dimensions allow for accurate seating and consistent bolt loading during installation

and setpoint status

Carrier HK02ZA395 Pressure Switch Els PW 17895 As a high-limit switchThe Carrier HK02ZA395 High Pressure Switch is a critical safety component designed for precise pressure monitoring in high side refrigeration circuits. Engineering as a genuine OEM replacement part, this switch protects your compressor from catastrophic failure by interrupting the control circuit when internal pressures exceed safe operating limits. This specific model features a high limit 406 PSI open threshold and an automatic 300 PSI close reset