diff --git a/Makefile.local b/Makefile.local
index 5aeb27c..415f80e 100644
--- a/Makefile.local
+++ b/Makefile.local
@@ -1,7 +1,7 @@
 
 
 
-CXX_FLAGS 				= -O0 -g3 -Wall -std=c++11
+CXX_FLAGS 				= -O2 -Wall -std=c++11
 CXX_INCL 				= -I ../TinkerforgeCPPsimple/include -I ../TinkerforgeCPPsimple/third-party/tinkerforge/include -I ../TinkerforgeCPPsimple/third-party/log4cpp/include -I /usr/include
 
 LD_FLAGS 				= -pthread 
diff --git a/src/GrowControl.cpp b/src/GrowControl.cpp
index c928eb1..67fc76c 100644
--- a/src/GrowControl.cpp
+++ b/src/GrowControl.cpp
@@ -186,7 +186,7 @@ void GrowControl::newDeviceCallback(TfConnection& conn, TfDevice& device) {
 				io16ConnectFlag = true;
 				io16MissingFlag = false;
 				io16Bricklet->addListener(*this);
-				setFan1Level(fan1Level);
+				setFan1Level(fan1Level, true);
 				logger << log4cpp::Priority::INFO << "Added io16 device " << device.getDeviceName(true) << ".";
 			}
 			break;
@@ -367,11 +367,11 @@ bool GrowControl::isFan1Connected() {
 	return (io16Bricklet != nullptr && io16Bricklet->getDeviceState() == TfDeviceState::CONNECTED);
 }
 
-void GrowControl::setFan1Level(unsigned level) {
+void GrowControl::setFan1Level(unsigned level, bool force) {
 	if (level > fan1UpperLimit) {
 		level = fan1UpperLimit;
 	}
-	if (level != fan1Level) {
+	if (level != fan1Level || force) {
 		fan1Level = level;
 		if (isFan1Connected()) {
 			if (fan1Level <= 0) {
diff --git a/src/GrowControl.h b/src/GrowControl.h
index e68167a..f30273b 100644
--- a/src/GrowControl.h
+++ b/src/GrowControl.h
@@ -112,7 +112,7 @@ public:
 
 	bool isFan1Connected();
 	unsigned getFan1Level(bool force = false);
-	void setFan1Level(unsigned level);
+	void setFan1Level(unsigned level, bool force = false);
 	unsigned getFan1UpperLimit();
 	void setFan1UpperLimit(unsigned limit);
 	unsigned getFan1Max();