Index: firmware/App/Drivers/InternalADC.c
===================================================================
diff -u -ra9315539f527b92523b1598ff91e47db4d71dae2 -r3dd12fb9d032f85126db82ca48812a4652a5b75f
--- firmware/App/Drivers/InternalADC.c	(.../InternalADC.c)	(revision a9315539f527b92523b1598ff91e47db4d71dae2)
+++ firmware/App/Drivers/InternalADC.c	(.../InternalADC.c)	(revision 3dd12fb9d032f85126db82ca48812a4652a5b75f)
@@ -50,8 +50,8 @@
     INT_ADC_AVAILABLE_CHANNEL,            // 14
     INT_ADC_PROCESSOR_1_2_VOLTS,          // 15
     INT_ADC_REFERENCE_VOLTAGE,            // 16
-    INT_ADC_PRIMARY_HEATER_24_VOLTS,      // 17
-    INT_ADC_TRIMMER_HEATER_24_VOLTS,      // 18
+    INT_ADC_TRIMMER_HEATER_24_VOLTS,      // 17
+    INT_ADC_PRIMARY_HEATER_24_VOLTS,      // 18
     INT_ADC_REF_IN1,                      // 19
     INT_ADC_REF_IN2,                      // 20
     INT_ADC_BOARD_THERMISTOR,             // 21
@@ -68,8 +68,8 @@
     0.06438104, // PSIA- INT_ADC_DRAIN_PUMP_INLET_PRESSURE
     0.00073242, // V   - INT_ADC_RO_PUMP_FEEDBACK_DUTY_CYCLE
     1.0,        // ?   - INT_ADC_AVAILABLE_CHANNEL
-    0.00700441, // V   - INT_ADC_PRIMARY_HEATER_24_VOLTS (varies inversely with PWM for secondary element)
     0.00763285, // V   - INT_ADC_TRIMMER_HEATER_24_VOLTS (varies inversely with PWM)
+    0.00700441, // V   - INT_ADC_PRIMARY_HEATER_24_VOLTS (varies inversely with PWM for secondary element)
     0.001221,   // V   - INT_ADC_BOARD_THERMISTOR
     0.0007326,  // V   - INT_ADC_FPGA_1_8_VOLTS
     0.0007326,  // V   - INT_ADC_FPGA_1_VOLT