Copeland 998-0520-04 Module 30067439-890 use a multimeter to check

use a multimeter to check for electrical continuity across the terminals

They are identical

and the Trane SEN1453 Duct Temperature Sensor is the industry-standard solution for monitoring supply and return air

ensuring minimal downtime for critical HVACR infrastructure

When replacing a Maxitrol temperature probe

Copeland 998-0520-04 Module 30067439-890 use a multimeter to checkThe Copeland 998 0520 04 is a professional grade 24V motor protector module designed to safeguard scroll and reciprocating compressors from catastrophic failure. Operating as a solid state watchdog, this module monitors resistance from internal PTC thermistor sensors embedded in the motor windings. When the module detects high temperatures or electrical anomalies such as phase loss or unbalanced current, it interrupts the control circuit via the M1 M2