This component utilizes an SPST (Single Pole Single Throw) electrical configuration

Constructed to rigorous OEM standards

moisture in the sensing lines

The manufacturer updated the part number

Internal Vent Limiting: Features a factory-installed vent limiter to simplify installation and meet safety standards without additional external plumbing

White-Rodgers 1F89EZ-0251 Thermostat Els PW 17895 This component utilizes an SPSTThe White Rodgers 1F89EZ 0251 is a robust 2H 1C non programmable thermostat designed for precision control in residential and light commercial heat pump applications. For technicians managing 2 stage heating and 1 stage cooling configurations, this low voltage thermostat offers high reliability without the complexity of scheduling interfaces. It features a high contrast, backlit 2 inch digital display and utilizes a 24VAC hardwired or battery powered