Check for Sensor A Message Changed

If the Power to the System is OFF, Turn the Power ON to the System.
If the System is still in Priming Mode, Press any Temperature Button to Exit Priming Mode.
Is there Now any of the following Sensor Failure Messages on the Topside Panel Display?

YES - Changed to "Sb"             YES - Still "SA"

_ML200Sm-SB     _ML200Sm-SA

YES - Changed to "Snb"             YES - Still "SnA"

_ML400Sm-SNB_ML400Sm-SNA

YES - Changed to "SENSOR B SERVICE REQD"

_ML900Sm-SNB-SR

YES - Still "SENSOR A SERVICE REQD"

_ML900Sm-SNA-SR

NO - None of the Above Messages