diff --git a/octoprint_enclosure/static/js/enclosure.js b/octoprint_enclosure/static/js/enclosure.js
index 5022a66..98217f2 100644
--- a/octoprint_enclosure/static/js/enclosure.js
+++ b/octoprint_enclosure/static/js/enclosure.js
@@ -58,13 +58,15 @@ $(function () {
 
     self.isRegularOutput = function(index_id){
       return_value = false;
-      self.settingsViewModel.settings.plugins.enclosure.rpi_outputs().forEach(function (output) {
-        if (output.index_id() == index_id && output.output_type() == "regular") {
-          return_value = true;
-          return false;
-        }
-      });
-      return return_value;
+      if (typeof index_id != 'undefined'){
+        self.settingsViewModel.settings.plugins.enclosure.rpi_outputs().forEach(function (output) {
+          if (output.index_id() == index_id && output.output_type() == "regular") {
+            return_value = true;
+            return false;
+          }
+        });
+      }
+      return return_value;     
     };
 
     self.linkedTemperatureControl = function(sensor_index){
diff --git a/octoprint_enclosure/templates/enclosure_settings.jinja2 b/octoprint_enclosure/templates/enclosure_settings.jinja2
index 233c29c..732a9a2 100644
--- a/octoprint_enclosure/templates/enclosure_settings.jinja2
+++ b/octoprint_enclosure/templates/enclosure_settings.jinja2
@@ -96,7 +96,7 @@
             <input type="checkbox" data-bind="checked: pwm_temperature_linked"> {{ _('Link PWM to Temperature') }}
           </label>
           <span class="help-inline">Link PWM ouput to temperature. PWM output will be interpolated between the point from duty A, temperature A -> duty B, temperature B. 
-            This output will automatomatically start when a print starts and will default to the default dutu cycle when print is complete.
+            This output will automatomatically start when a print starts and will default to the default duty cycle when print is complete.
           </span>
         </div>
       </div>
@@ -159,7 +159,7 @@
     <!-- /ko -->
 
 
-    <!-- ko if: ($data.output_type() == "pwm" && !$data.pwm_temperature_linked()) -->
+    <!-- ko ifnot: ($data.output_type() == "pwm" && $data.pwm_temperature_linked()) -->
     <!-- ko ifnot: (($data.output_type() == "regular" || $data.output_type() == "pwm") &&  $data.toggle_timer()) -->
     <!-- ko ifnot: ($data.output_type() == "gcode_output" || $data.output_type() == "temperature_alarm" ) -->
     <div class="control-group">
@@ -604,7 +604,7 @@
         <span class="help-inline">When the event happen, you want control which OUTPUT?</span>
       </div>
     </div>
-    <!-- ko if: ($root.isRegularOutput($data.controlled_io()))  -->
+    <!-- ko if: ($root.isRegularOutput($data.controlled_io))  -->
     <div class="control-group">
       <label class="control-label">Set Controlled IO Value</label>
       <div class="controls">
diff --git a/octoprint_enclosure/templates/enclosure_tab.jinja2 b/octoprint_enclosure/templates/enclosure_tab.jinja2
index d7a6294..ddabc9a 100644
--- a/octoprint_enclosure/templates/enclosure_tab.jinja2
+++ b/octoprint_enclosure/templates/enclosure_tab.jinja2
@@ -189,7 +189,7 @@
 </h4>
 <!-- /ko -->
 
-<!-- ko if: ($data.output_type() == "pwm" && !$data.pwm_temperature_linked()) -->
+<!-- ko ifnot: ($data.output_type() == "pwm" && $data.pwm_temperature_linked()) -->
 <!-- ko ifnot: (($data.output_type() == "regular" || $data.output_type() == "pwm") &&  $data.toggle_timer()) -->
 <!-- ko ifnot: ($data.output_type() == "gcode_output" || $data.output_type() == "temperature_alarm") -->
 <div>