diff --git a/pytec/tec_qt.py b/pytec/tec_qt.py
index 72a3227..9c27950 100644
--- a/pytec/tec_qt.py
+++ b/pytec/tec_qt.py
@@ -511,11 +511,11 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
         self.plot_settings.setMenu(self.plot_menu)
 
     @pyqtSlot(list)
-    def set_limits_warning(self, limits_zeroed: list):
+    def set_limits_warning(self, channels_zeroed_limits: list):
         channel_disabled = [False, False]
 
         report_str = "The following output limit(s) are set to zero:\n"
-        for ch, zeroed_limits in enumerate(limits_zeroed):
+        for ch, zeroed_limits in enumerate(channels_zeroed_limits):
             if {'max_i_pos', 'max_i_neg'}.issubset(zeroed_limits):
                 report_str += "Max Cooling Current, Max Heating Current"
                 channel_disabled[ch] = True
@@ -813,7 +813,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
 
     @pyqtSlot(list)
     def update_pwm(self, pwm_data):
-        channel_zeroed_limits = [set() for i in range(2)]
+        channels_zeroed_limits = [set() for i in range(2)]
 
         for pwm_params in pwm_data:
             channel = pwm_params["channel"]
@@ -824,9 +824,9 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
 
             for limit in "max_i_pos", "max_i_neg", "max_v":
                 if pwm_params[limit]["value"] == 0.0:
-                    channel_zeroed_limits[channel].add(limit)
+                    channels_zeroed_limits[channel].add(limit)
 
-        self.set_limits_warning(channel_zeroed_limits)
+        self.set_limits_warning(channels_zeroed_limits)
 
     @pyqtSlot(list)
     def update_postfilter(self, postfilter_data):