diff --git a/resources/calib/temperature_tower/temperature_tower.stl b/resources/calib/temperature_tower/temperature_tower.stl
index b75f9af53b..1af2fcf199 100644
Binary files a/resources/calib/temperature_tower/temperature_tower.stl and b/resources/calib/temperature_tower/temperature_tower.stl differ
diff --git a/src/slic3r/GUI/calib_dlg.cpp b/src/slic3r/GUI/calib_dlg.cpp
index 5d23517a21..874e7f891d 100644
--- a/src/slic3r/GUI/calib_dlg.cpp
+++ b/src/slic3r/GUI/calib_dlg.cpp
@@ -321,13 +321,13 @@ Temp_Calibration_Dlg::Temp_Calibration_Dlg(wxWindow* parent, wxWindowID id, Plat
         unsigned long t = 0;
         if(!ti->GetTextCtrl()->GetValue().ToULong(&t))
             return;
-        if(t> 350 || t < 180){
-            MessageDialog msg_dlg(nullptr, wxString::Format(L"Supported range: 180%s - 350%s",_L("\u2103"),_L("\u2103")), wxEmptyString, wxICON_WARNING | wxOK);
+        if(t> 350 || t < 170){
+            MessageDialog msg_dlg(nullptr, wxString::Format(L"Supported range: 170%s - 350%s",_L("\u2103"),_L("\u2103")), wxEmptyString, wxICON_WARNING | wxOK);
             msg_dlg.ShowModal();
             if(t > 350)
                 t = 350;
             else
-                t = 180;
+                t = 170;
         }
         t = (t / 5) * 5;
         ti->GetTextCtrl()->SetValue(std::to_string(t));
@@ -358,8 +358,8 @@ void Temp_Calibration_Dlg::on_start(wxCommandEvent& event) {
     read_long = m_tiStart->GetTextCtrl()->GetValue().ToULong(&start);
     read_long = read_long && m_tiEnd->GetTextCtrl()->GetValue().ToULong(&end);
 
-    if (!read_long || start > 350 || end < 180  || end > (start - 5)) {
-        MessageDialog msg_dlg(nullptr, _L("Please input valid values:\nStart temp: <= 350\nEnd temp: >= 180\nStart temp > End temp + 5)"), wxEmptyString, wxICON_WARNING | wxOK);
+    if (!read_long || start > 350 || end < 170  || end > (start - 5)) {
+        MessageDialog msg_dlg(nullptr, _L("Please input valid values:\nStart temp: <= 350\nEnd temp: >= 170\nStart temp > End temp + 5)"), wxEmptyString, wxICON_WARNING | wxOK);
         msg_dlg.ShowModal();
         return;
     }