If the control board displays a sensor failure code

Built to withstand the rigorous demands of commercial and residential service

The Macon Controls N10950 is a high-performance 3/4 inch sweat straight radiator valve body engineered for precision flow regulation in hydronic and low-pressure steam heating systems

you’ll appreciate the break-off shaft design

black elastomer material capable of sustaining the thermal cycling and pressure differentials common in condensing furnace applications

Johnson Controls T-4502-1736 Pneumatic Cover Els PW 17895 If the control board displaysPneumatic Cover, Nickel, Horizontal, No Thermometer or Setpoint Window