diff --git a/pytec/tec_qt.py b/pytec/tec_qt.py
index 523ff42..5bd1b00 100644
--- a/pytec/tec_qt.py
+++ b/pytec/tec_qt.py
@@ -170,7 +170,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
         self.ch1_t_connector = DataConnector(self.ch1_t_plot, max_points=self.DEFAULT_MAX_SAMPLES)
         self.ch1_i_connector = DataConnector(self.ch1_i_plot, max_points=self.DEFAULT_MAX_SAMPLES)
 
-        self.fan_pwm_recommended = False
+        self.hw_rev_data = None
 
         self.tec_client = Client()
         self.client_watcher = ClientWatcher(self, self.tec_client, self.report_refresh_spin.value())
@@ -394,9 +394,9 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
 
     def _status(self, hw_rev_d: dict):
         logging.debug(hw_rev_d)
+        self.hw_rev_data = hw_rev_d
         self.status_lbl.setText(f"Connected to Thermostat v{hw_rev_d['rev']['major']}.{hw_rev_d['rev']['minor']}")
         self.fan_group.setEnabled(hw_rev_d["settings"]["fan_available"])
-        self.fan_pwm_recommended = hw_rev_d["settings"]["fan_pwm_recommended"]
 
     @pyqtSlot(dict)
     def fan_update(self, fan_settings: dict):
@@ -407,7 +407,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
             self.fan_power_slider.setValue(fan_settings["fan_pwm"] or 100) # 0 = PWM off = full strength
         with QSignalBlocker(self.fan_auto_box):
             self.fan_auto_box.setChecked(fan_settings["auto_mode"])
-        if not self.fan_pwm_recommended:
+        if not self.hw_rev_data["settings"]["fan_pwm_recommended"]:
             self._set_fan_pwm_warning()
 
     @asyncSlot(int)
@@ -418,7 +418,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
             with QSignalBlocker(self.fan_auto_box):
                 self.fan_auto_box.setChecked(False)
         await self.tec_client.set_param("fan", value)
-        if not self.fan_pwm_recommended:
+        if not self.hw_rev_data["settings"]["fan_pwm_recommended"]:
             self._set_fan_pwm_warning()
 
     @asyncSlot(int)