Index: firmware/App/Controllers/Thermistors.c
===================================================================
diff -u -re6453f6070bec116e1f1e3a553eb2c6a7aac1f9d -r6bf297b685487355fd581f221c59cf9d5a4fa53e
--- firmware/App/Controllers/Thermistors.c	(.../Thermistors.c)	(revision e6453f6070bec116e1f1e3a553eb2c6a7aac1f9d)
+++ firmware/App/Controllers/Thermistors.c	(.../Thermistors.c)	(revision 6bf297b685487355fd581f221c59cf9d5a4fa53e)
@@ -270,12 +270,12 @@
 static void monitorThermistors( void )
 {
     THERMISTORS_TEMP_SENSORS_T sensorId;
-    THERMISTORS_TEMP_SENSORS_T sensorInAlarm = THERMISTOR_ONBOARD_NTC;
+    THERMISTORS_TEMP_SENSORS_T sensorInAlarm = THERMISTOR_FIRST;
     F32 temperature        = 0.0F;
     BOOL isTempOutOfRange  = FALSE;
     F32  alarmTemperature  = 0.0F;
 
-    for ( sensorId = THERMISTOR_ONBOARD_NTC; sensorId < NUM_OF_THERMISTORS; sensorId++ )
+    for ( sensorId = THERMISTOR_FIRST; sensorId < NUM_OF_THERMISTORS; sensorId++ )
     {
         temperature = getThermistorTemperatureValue( sensorId );
 
@@ -335,11 +335,11 @@
     // Voltage = ADC x (voltage reference) / (ADC bit resolution)
     F32 thermistorVoltage = adcValue * ( thermistorsStatus[ thermistor ].voltageReference / thermistorsStatus[ thermistor ].adcBitResolution );
 
-    // Calculate the thermistor resistor by solving: thermistorVoltage = (3 x 10) / (10 + R(T))
+    // Calculate the thermistor resistor voltage reference - current voltage (at 25 degrees C)
     F32 thermistorResistor = ( ( THERMISTOR_REFERENCE_RESISTOR_AT_25 * thermistorsStatus[ thermistor ].voltageReference ) -
                                ( THERMISTOR_REFERENCE_RESISTOR_AT_25 * thermistorVoltage ) ) / thermistorVoltage;
 
-    // 1/T = Ln(thermistorResistor/10000)/3380 + 1/298
+    // 1/T = Ln(thermistorResistor/THERMISTOR_REFERENCE_RESISTOR_AT_25)/THERMISTOR_BETA_VALUE + THERMISTOR_REF_TEMP_INV
     F32 invTemperature = ( logf( thermistorResistor / THERMISTOR_REFERENCE_RESISTOR_AT_25 ) / THERMISTOR_BETA_VALUE ) + THERMISTOR_REF_TEMP_INV;
 
     // Inverse the value to get the temperature in Kelvin and then convert it to Celsius