diff --git a/src/slic3r/GUI/DeviceManager.cpp b/src/slic3r/GUI/DeviceManager.cpp
index c3e7d7c22..f6ce0ed69 100644
--- a/src/slic3r/GUI/DeviceManager.cpp
+++ b/src/slic3r/GUI/DeviceManager.cpp
@@ -2336,18 +2336,36 @@ int MachineObject::parse_json(std::string payload)
                         big_fan1_speed = (int)((fan_gear & 0x0000FF00) >> 8);
                         cooling_fan_speed= (int)((fan_gear & 0x000000FF) >> 0);
                     }
-                   /* if (jj.contains("cooling_fan_speed")) {
-                        cooling_fan_speed = stoi(jj["cooling_fan_speed"].get<std::string>());
+                    else {
+                        if (jj.contains("cooling_fan_speed")) {
+                            cooling_fan_speed = stoi(jj["cooling_fan_speed"].get<std::string>());
+                            cooling_fan_speed = round(floor(cooling_fan_speed / float(1.5)));
+                        }
+                        else {
+                            cooling_fan_speed = 0;
+                        }
+
+                        if (jj.contains("big_fan1_speed")) {
+                            big_fan1_speed = stoi(jj["big_fan1_speed"].get<std::string>());
+                            big_fan1_speed = round(floor(big_fan1_speed / float(1.5)));
+                        }
+                        else {
+                            big_fan1_speed = 0;
+                        }
+
+                        if (jj.contains("big_fan2_speed")) {
+                            big_fan2_speed = stoi(jj["big_fan2_speed"].get<std::string>());
+                            big_fan2_speed = round(floor(big_fan2_speed / float(1.5)));
+                        }
+                        else {
+                            big_fan2_speed = 0;
+                        }
                     }
-                    if (jj.contains("big_fan1_speed")) {
-                        big_fan1_speed = stoi(jj["big_fan1_speed"].get<std::string>());
-                    }
-                    if (jj.contains("big_fan2_speed")) {
-                        big_fan2_speed = stoi(jj["big_fan2_speed"].get<std::string>());
-                    }*/
+
                     if (jj.contains("heatbreak_fan_speed")) {
                         heatbreak_fan_speed = stoi(jj["heatbreak_fan_speed"].get<std::string>());
                     }
+                    
                     /* parse speed */
                     try {
                         if (jj.contains("spd_lvl")) {
diff --git a/src/slic3r/GUI/StatusPanel.cpp b/src/slic3r/GUI/StatusPanel.cpp
index f5d54fed6..aa76bc129 100644
--- a/src/slic3r/GUI/StatusPanel.cpp
+++ b/src/slic3r/GUI/StatusPanel.cpp
@@ -1734,7 +1734,7 @@ void StatusPanel::update_misc_ctrl(MachineObject *obj)
     if (m_switch_nozzle_fan_timeout > 0) {
         m_switch_nozzle_fan_timeout--;
     }  else{
-        int speed = floor(obj->cooling_fan_speed / float(25.5));
+        int speed = round(obj->cooling_fan_speed / float(25.5));
         m_switch_nozzle_fan->SetValue(speed > 0 ? true : false);
         m_switch_nozzle_fan->setFanValue(speed * 10);
         m_fan_control_popup.update_fan_data(MachineObject::FanType::COOLING_FAN, obj);
@@ -1744,7 +1744,7 @@ void StatusPanel::update_misc_ctrl(MachineObject *obj)
     if (m_switch_printing_fan_timeout > 0) {
         m_switch_printing_fan_timeout--;
     }else{
-        int speed = floor(obj->big_fan1_speed / float(25.5));
+        int speed = round(obj->big_fan1_speed / float(25.5));
         m_switch_printing_fan->SetValue(speed > 0 ? true : false);
         m_switch_printing_fan->setFanValue(speed * 10);
         m_fan_control_popup.update_fan_data(MachineObject::FanType::BIG_COOLING_FAN, obj);
@@ -1754,7 +1754,7 @@ void StatusPanel::update_misc_ctrl(MachineObject *obj)
     if (m_switch_cham_fan_timeout > 0) {
         m_switch_cham_fan_timeout--;
     }else{
-        int speed = floor(obj->big_fan2_speed / float(25.5));
+        int speed = round(obj->big_fan2_speed / float(25.5));
         m_switch_cham_fan->SetValue(speed > 0 ? true : false);
         m_switch_cham_fan->setFanValue(speed * 10);
         m_fan_control_popup.update_fan_data(MachineObject::FanType::CHAMBER_FAN, obj);
diff --git a/src/slic3r/GUI/Widgets/FanControl.cpp b/src/slic3r/GUI/Widgets/FanControl.cpp
index 65a9e2232..7e4eadb61 100644
--- a/src/slic3r/GUI/Widgets/FanControl.cpp
+++ b/src/slic3r/GUI/Widgets/FanControl.cpp
@@ -462,7 +462,7 @@ void FanControl::set_name(wxString name)
 void FanControl::set_fan_speed(int g)
 {
     if (g < 0 || g > 255) return;
-    int speed = floor(float(g) / float(25.5));
+    int speed = round(float(g) / float(25.5));
 
     if (m_current_speed != speed) {
         m_current_speed = speed;