Aaon P45120 Timer Els PW 17895 This insertion type crankcase heater

This insertion type crankcase heater is engineered for a 460-volt power supply

Single-pole versions are often used in residential units to allow for a constant "trickle" of power to keep the compressor crankcase warm

A reading of "OL" or open circuit while the motor is at rest typically indicates pitted or failed contacts

This coil has an IP00 rating

Aaon P45120 Timer Els PW 17895 This insertion type crankcase heaterThe Aaon P45120 is a specialized 24V guaranteed off timer designed specifically for HVAC system protection and compressor longevity. This delay on break timer prevents short cycling by enforcing a precise 5 minute restart delay, ensuring that system pressures equalize before the compressor initiates a new cooling cycle. Engineered for compatibility with Aaon HVAC units and various commercial rooftop units, the P45120 addresses high cycling issues