diff --git a/src/slic3r/GUI/DeviceManager.cpp b/src/slic3r/GUI/DeviceManager.cpp
index 2280c270b..c26e32fb3 100644
--- a/src/slic3r/GUI/DeviceManager.cpp
+++ b/src/slic3r/GUI/DeviceManager.cpp
@@ -1132,23 +1132,25 @@ MachineObject::LIGHT_EFFECT MachineObject::light_effect_parse(std::string effect
 
 std::string MachineObject::get_firmware_type_str()
 {
-    if (firmware_type == PrinterFirmwareType::FIRMWARE_TYPE_ENGINEER)
+    /*if (firmware_type == PrinterFirmwareType::FIRMWARE_TYPE_ENGINEER)
         return "engineer";
     else if (firmware_type == PrinterFirmwareType::FIRMWARE_TYPE_PRODUCTION)
-        return "product";
+        return "product";*/
 
-    // return engineer by default;
-    return "engineer";
+    // return product by default;
+    // always return product, printer do not push this field
+    return "product";
 }
 
 std::string MachineObject::get_lifecycle_type_str()
 {
-    if (lifecycle == PrinterFirmwareType::FIRMWARE_TYPE_ENGINEER)
+    /*if (lifecycle == PrinterFirmwareType::FIRMWARE_TYPE_ENGINEER)
         return "engineer";
     else if (lifecycle == PrinterFirmwareType::FIRMWARE_TYPE_PRODUCTION)
-        return "product";
+        return "product";*/
 
     // return product by default;
+    // always return product, printer do not push this field
     return "product";
 }
 
@@ -1641,7 +1643,7 @@ int MachineObject::command_control_fan(FanType fan_type, bool on_off)
     std::string gcode = (boost::format("M106 P%1% S%2% \n") % (int)fan_type % (on_off ? 255 : 0)).str();
     try {
         json j;
-        j["crtl_type"] = get_string_from_fantype(fan_type);
+        j["ctrl_type"] = get_string_from_fantype(fan_type);
         j["value"] = on_off ? (int)1 : (int)0;
 
         NetworkAgent* agent = GUI::wxGetApp().getAgent();