an open reading at room temperature indicates a failed internal bimetal disc

Interchangeable Design: Fully compatible with Size 10 Type S components from major manufacturers

providing reliable expansion in both heating and cooling modes

With a 21-ohm coil resistance and water-resistant housing

always verify the WC set point on the existing switch label before installation

Johnson Controls T22SFB-1 Thermostat R-410A an open reading at roomJohnson Controls T22SFB 1 Line Voltage Wall Thermostat, Heating and Cooling Applications, Knob Adjustment, SPDT, Used to Control Separate Loads on Heating and Cooling, Heat Off Cool Selector Switch, 1 3 4 Degree Heating Differential, 2 1 4 Degree Differential, 40 to 90 Degree Tempeature Range T22SFB 1 is identical to T22SFB 1C