Index: firmware/App/Controllers/Heaters.c
===================================================================
diff -u -r0a8d902c3a7c4883ce6692cc53e85b254cef82c4 -rdc783f26994ed6eed74c8e3656fe6c9d38b9f9bd
--- firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision 0a8d902c3a7c4883ce6692cc53e85b254cef82c4)
+++ firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision dc783f26994ed6eed74c8e3656fe6c9d38b9f9bd)
@@ -48,6 +48,7 @@
 #define HEATERS_DISINFECT_TEMPERATURE_DRIFT_C                      3.0F                                                            ///< Heaters disinfect temperature drift in C.
 #define HEATERS_ZERO_DELTA_TEMP_C                                  0.0F                                                            ///< Heaters zero delta temperature in C.
 #define HEATERS_DUTY_CYCLE_CONVERSION_FACTOR                       100.0F                                                          ///< Heaters duty cycle 0: OFF, 100: 100% duty cycle.
+#define TRIMMER_HEATER_GAIN                                        10.0F                                                           ///< Trimmer heater gain for testing.
 
 #define PRIMARY_HEATER_P_COEFFICIENT                               1.0F                                                            ///< P Term for primary heater control.
 #define PRIMARY_HEATER_I_COEFFICIENT                               1.0F                                                            ///< I Term for primary heater control.
@@ -512,7 +513,10 @@
                 if ( targetTemperature >  0.0F )
                 {
                     ctrl = HEATERS_MAX_DUTY_CYCLE - ( measuredTemperature / targetTemperature );
-                    ctrl = ( ctrl < 0.0F ? HEATERS_MIN_DUTY_CYCLE: ctrl );
+                    ctrl = ( ctrl < 0.0F ? HEATERS_MIN_DUTY_CYCLE: ctrl * TRIMMER_HEATER_GAIN );
+                    //Apply dutycycle limit
+                    ctrl = MIN( ctrl, HEATERS_MAX_DUTY_CYCLE );
+                    ctrl = MAX( ctrl, HEATERS_MIN_DUTY_CYCLE );
                 }
 
                 control[ heater ].data  = ( ctrl * HEATERS_DUTY_CYCLE_CONVERSION_FACTOR ) + FLOAT_TO_INT_ROUNDUP_OFFSET;