diff --git a/src/Mod/AddonManager/addonmanager_connection_checker.py b/src/Mod/AddonManager/addonmanager_connection_checker.py
index 76cf14a574de..ac3c08aa1439 100644
--- a/src/Mod/AddonManager/addonmanager_connection_checker.py
+++ b/src/Mod/AddonManager/addonmanager_connection_checker.py
@@ -45,8 +45,7 @@ def __init__(self):
 
         # Check the connection in a new thread, so FreeCAD stays responsive
         self.connection_checker = ConnectionChecker()
-        self.connection_checker.success.connect(self._check_succeeded)
-        self.connection_checker.failure.connect(self._network_connection_failed)
+        self.signals_connected = False
 
         self.connection_message_timer = None
         self.connection_check_message = None
@@ -54,6 +53,9 @@ def __init__(self):
     def start(self):
         """Start the connection check"""
         self.connection_checker.start()
+        self.connection_checker.success.connect(self._check_succeeded)
+        self.connection_checker.failure.connect(self._network_connection_failed)
+        self.signals_connected = True
 
         # If it takes longer than a half second to check the connection, show a message:
         self.connection_message_timer = QtCore.QTimer.singleShot(
@@ -75,8 +77,7 @@ def _show_connection_check_message(self):
     def cancel_network_check(self, _):
         """Cancel the check"""
         if not self.connection_checker.isFinished():
-            self.connection_checker.success.disconnect(self._check_succeeded)
-            self.connection_checker.failure.disconnect(self._network_connection_failed)
+            self._disconnect_signals()
             self.connection_checker.requestInterruption()
             self.connection_checker.wait(500)
             self.connection_check_message.close()
@@ -99,10 +100,12 @@ def _network_connection_failed(self, message: str) -> None:
                 translate("AddonsInstaller", "Missing dependency"),
                 translate(
                     "AddonsInstaller",
-                    "Could not import QtNetwork -- see Report View for details. Addon Manager unavailable.",
+                    "Could not import QtNetwork -- see Report View for details. Addon Manager "
+                    "unavailable.",
                 ),
             )
 
+        self._disconnect_signals()
         self.check_complete.emit()
 
     def _check_succeeded(self):
@@ -112,4 +115,11 @@ def _check_succeeded(self):
             self.connection_check_message.close()
 
         self.connection_available.emit()
+        self._disconnect_signals()
         self.check_complete.emit()
+
+    def _disconnect_signals(self):
+        if self.signals_connected:
+            self.connection_checker.success.disconnect(self._check_succeeded)
+            self.connection_checker.failure.disconnect(self._network_connection_failed)
+        self.signals_connected = False
diff --git a/src/Mod/AddonManager/addonmanager_workers_utility.py b/src/Mod/AddonManager/addonmanager_workers_utility.py
index e25912c76f29..c0c72f7066dd 100644
--- a/src/Mod/AddonManager/addonmanager_workers_utility.py
+++ b/src/Mod/AddonManager/addonmanager_workers_utility.py
@@ -27,7 +27,8 @@
 
 import FreeCAD
 from PySide import QtCore
-import addonmanager_utilities as utils
+import NetworkManager
+import time
 
 translate = FreeCAD.Qt.translate
 
@@ -42,32 +43,49 @@ class ConnectionChecker(QtCore.QThread):
 
     def __init__(self):
         QtCore.QThread.__init__(self)
+        self.done = False
+        self.request_id = 0
+        self.data = None
 
     def run(self):
-        """Not generally called directly: create a new ConnectionChecker object and
-        call start() on it to spawn a child thread."""
+        """Not generally called directly: create a new ConnectionChecker object and call start()
+        on it to spawn a child thread."""
 
         FreeCAD.Console.PrintLog("Checking network connection...\n")
-        result = self.check_network_connection()
-        if QtCore.QThread.currentThread().isInterruptionRequested():
-            FreeCAD.Console.PrintLog("Connection check cancelled\n")
-            return
-        if not result:
+        url = "https://api.github.com/zen"
+        self.done = False
+        NetworkManager.AM_NETWORK_MANAGER.completed.connect(self.connection_data_received)
+        self.request_id = NetworkManager.AM_NETWORK_MANAGER.submit_unmonitored_get(url)
+        while not self.done:
+            if QtCore.QThread.currentThread().isInterruptionRequested():
+                FreeCAD.Console.PrintLog("Connection check cancelled\n")
+                NetworkManager.AM_NETWORK_MANAGER.abort(self.request_id)
+                self.disconnect_network_manager()
+                return
+            QtCore.QCoreApplication.processEvents()
+            time.sleep(0.1)
+        if not self.data:
             self.failure.emit(
                 translate(
                     "AddonsInstaller",
-                    "Unable to read data from GitHub: check your internet connection and proxy settings and try again.",
+                    "Unable to read data from GitHub: check your internet connection and proxy "
+                    "settings and try again.",
                 )
             )
+            self.disconnect_network_manager()
             return
-        FreeCAD.Console.PrintLog(f"GitHub's zen message response: {result}\n")
+        FreeCAD.Console.PrintLog(f"GitHub's zen message response: {self.data.decode}\n")
+        self.disconnect_network_manager()
         self.success.emit()
 
-    def check_network_connection(self) -> Optional[str]:
-        """The main work of this object: returns the decoded result of the connection request, or
-        None if the request failed"""
-        url = "https://api.github.com/zen"
-        result = utils.blocking_get(url)
-        if result:
-            return result.decode("utf8")
-        return None
+    def connection_data_received(self, id: int, status: int, data: QtCore.QByteArray):
+        if self.request_id and self.request_id == id:
+            if status == 200:
+                self.data = data
+            else:
+                FreeCAD.Console.PrintWarning(f"No data received: status returned was {status}\n")
+                self.data = None
+        self.done = True
+
+    def disconnect_network_manager(self):
+        NetworkManager.AM_NETWORK_MANAGER.completed.disconnect(self.connection_data_received)