White-Rodgers 1F85U-42PR Thermostat Els PW 17895 In high-pressure steam systems

In high-pressure steam systems

Check the secondary output with a multimeter

For most HVAC zone motor applications

this OEM flame sensor replacement monitors the burner assembly to confirm successful ignition

helping to prevent liquid slugging or control failures in Johnson Controls and York units

White-Rodgers 1F85U-42PR Thermostat Els PW 17895 In high-pressure steam systemsThe White Rodgers 1F85U 42PR is a versatile 80 Series universal programmable thermostat engineered for high performance control across a wide range of HVAC configurations. Supporting up to 4 Heat 2 Cool heat pump stages or 2 Heat 2 Cool conventional systems, this unit provides the flexibility professional contractors require for diverse residential and light commercial job sites. It features a high contrast 5 inch backlit display for superior