Are the 311852 and 311852/U parts interchangeable

making it suitable for standard residential split systems and heat pump applications

maintaining the exact orifice alignment required for a stable flame pattern and optimal manifold pressure

this model is certified as an appliance regulator for pounds to inches reduction

ensuring the control board recognizes the signal immediately

White-Rodgers 1F85U-22NP Thermostat Els PW 17895 Are the 311852 and 311852/UThe White Rodgers 1F85U 22NP Thermostat is a versatile, professional grade solution designed for contractors needing a reliable, non programmable 80 Series thermostat to handle diverse system architectures. This universal staging thermostat is the direct replacement for the legacy 1F83 0422, maintaining a familiar interface while upgrading internal logic for modern standards. It supports 2 Heat 2 Cool conventional systems and 2 Heat 1 Cool heat pump