diff --git a/pytec/tec_qt.py b/pytec/tec_qt.py
index e154924..c8bfbf0 100644
--- a/pytec/tec_qt.py
+++ b/pytec/tec_qt.py
@@ -80,6 +80,9 @@ def get_argparser():
 class WrappedClient(QObject, Client):
     connection_error = pyqtSignal()
 
+    def __init__(self, parent):
+        super().__init__(parent)
+
     async def _read_line(self):
         try:
             return await super()._read_line()
@@ -87,6 +90,18 @@ class WrappedClient(QObject, Client):
             logging.error("Client connection error, disconnecting", exc_info=True)
             self.connection_error.emit()
 
+    async def _check_zero_limits(self):
+        pwm_report = await self.get_pwm()
+        for pwm_channel in pwm_report:
+            if (neg := pwm_channel["max_i_neg"]["value"]) != (pos := pwm_channel["max_i_pos"]["value"]):
+                # Set the minimum of the 2
+                lcd = min(neg, pos)
+                await self.set_param("pwm", pwm_channel["channel"], 'max_i_neg', lcd)
+                await self.set_param("pwm", pwm_channel["channel"], 'max_i_pos', lcd)
+            for limit in ["max_i_pos", "max_v"]:
+                if pwm_channel[limit]["value"] == 0.0:
+                    QtWidgets.QMessageBox.warning(self.parent(), "Limits", "Max {} is set to zero on channel {}!".format("Current" if limit == "max_i_pos" else "Voltage", pwm_channel["channel"]))
+
 
 class ClientWatcher(QObject):
     fan_update = pyqtSignal(dict)
@@ -180,7 +195,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
 
         self.hw_rev_data = None
 
-        self.client = WrappedClient()
+        self.client = WrappedClient(self)
         self.client.connection_error.connect(self.bail)
         self.client_watcher = ClientWatcher(self, self.client, self.report_refresh_spin.value())
         self.client_watcher.fan_update.connect(self.fan_update)