Johnson Controls T23A-1 Thermostat Refrigerant Reusing a compressed gasket can

Reusing a compressed gasket can result in micro-leaks that affect combustion analysis results

this part is the current official replacement and provides full backwards compatibility with all systems previously utilizing the 100167689 or RLY2108 sequence

While technically a pressure switch

Using it with different refrigerants will result in improper superheat and potential system damage

Johnson Controls T23A-1 Thermostat Refrigerant Reusing a compressed gasket canFan Coil Thermostat, 120 240 Vac, Low Med High Fan Switching, Heat Off Cool System Switching, 50 to 90 Degree Teperature Range, 1 3 4 Degree Heating Differential, 2 1 4 Degree Cooling Differential T23A 1 is identical to T23A 1C