Index: firmware/App/Services/PIControllers.c
===================================================================
diff -u -r138efd92a8645e0d2fe422409ef5a33dd2929a25 -r68fc03b5a22f14190146fc9069f022c109682b63
--- firmware/App/Services/PIControllers.c	(.../PIControllers.c)	(revision 138efd92a8645e0d2fe422409ef5a33dd2929a25)
+++ firmware/App/Services/PIControllers.c	(.../PIControllers.c)	(revision 68fc03b5a22f14190146fc9069f022c109682b63)
@@ -54,10 +54,10 @@
 /// PI Controllers -- initial configurations.
 static PI_CONTROLLER_T piControllers[ NUM_OF_PI_CONTROLLERS_IDS ] =
 {   // Kp   Ki  uMax  uMin  ref meas  err  esw esum ctrl
-    { 0.0, 0.0,  1.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 },  // PI_CONTROLLER_ID_RO_PUMP
-    { 0.0, 0.0,  1.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 },  // PI_CONTROLLER_ID_DRAIN_PUMP
-    { 0.0, 0.0,  1.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 },  // PI_CONTROLLER_ID_PRIMARY_HEATER
-    { 0.0, 0.0,  1.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 }   // PI_CONTROLLER_ID_TRIMMER_HEATER
+    { 0.0, 0.0, 1.0,  0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 },  // PI_CONTROLLER_ID_RO_PUMP
+    { 0.0, 0.0, 1.0,  0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 },  // PI_CONTROLLER_ID_DRAIN_PUMP
+    { 0.0, 0.0, 1.0,  0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 },  // PI_CONTROLLER_ID_PRIMARY_HEATER
+    { 0.0, 0.0, 0.25, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 }   // PI_CONTROLLER_ID_TRIMMER_HEATER
 };
 
 /*********************************************************************//**