diff --git a/pytec/pytec/gui/view/thermostat_ctrl_menu.py b/pytec/pytec/gui/view/thermostat_ctrl_menu.py
index f264b9f..2278eef 100644
--- a/pytec/pytec/gui/view/thermostat_ctrl_menu.py
+++ b/pytec/pytec/gui/view/thermostat_ctrl_menu.py
@@ -3,6 +3,7 @@ from PyQt6 import QtWidgets, QtGui, QtCore
 from PyQt6.QtCore import pyqtSignal, pyqtSlot, QSignalBlocker
 from qasync import asyncSlot
 from pytec.gui.view.net_settings_input_diag import NetSettingsInputDiag
+from pytec.gui.model.thermostat import ThermostatConnectionState
 
 
 class ThermostatCtrlMenu(QtWidgets.QMenu):
@@ -15,6 +16,9 @@ class ThermostatCtrlMenu(QtWidgets.QMenu):
 
         self.hw_rev_data = dict()
         self._thermostat.hw_rev_update.connect(self.hw_rev)
+        self._thermostat.connection_state_changed.connect(
+            self.thermostat_state_change_handler
+        )
 
         self.fan_group = QtWidgets.QWidget()
         self.fan_group.setEnabled(False)
@@ -144,6 +148,12 @@ class ThermostatCtrlMenu(QtWidgets.QMenu):
             self.fan_pwm_warning.setPixmap(QtGui.QPixmap())
             self.fan_pwm_warning.setToolTip("")
 
+    @pyqtSlot(ThermostatConnectionState)
+    def thermostat_state_change_handler(self, state):
+        if state == ThermostatConnectionState.DISCONNECTED:
+            self.thermostat_ctrl_menu.fan_pwm_warning.setPixmap(QtGui.QPixmap())
+            self.thermostat_ctrl_menu.fan_pwm_warning.setToolTip("")
+
     @pyqtSlot("QVariantMap")
     def hw_rev(self, hw_rev):
         self.hw_rev_data = hw_rev
diff --git a/pytec/tec_qt.py b/pytec/tec_qt.py
index e391f24..a24fed1 100755
--- a/pytec/tec_qt.py
+++ b/pytec/tec_qt.py
@@ -164,8 +164,6 @@ class MainWindow(QtWidgets.QMainWindow):
                 self.background_task_lbl.setText("Ready.")
                 self.loading_spinner.hide()
                 self.loading_spinner.stop()
-                self.thermostat_ctrl_menu.fan_pwm_warning.setPixmap(QtGui.QPixmap())
-                self.thermostat_ctrl_menu.fan_pwm_warning.setToolTip("")
                 self.channel_graphs.clear_graphs()
                 self.report_box.setChecked(False)
                 for ch in range(self.NUM_CHANNELS):