Anyone know how to test the thermistor on the subject control system? My salon a/c control is giving me some weird numbers. Showing inside temp at 19 but set at 76. When I try to do the factory reset and adjust the offset it will only let me adjust it to 40 or something. Almost like its reading Celsius for actual and Fahrenheit for set point. Control is set to show Fahrenheit. Im thinking the control board in engine room is bad but before I replaced it wanted to rule out the thermistor. Yes I have checked all the connections and visually all look good. Thanks for any help