diff --git a/src/octoprint/templates/tabs/control.jinja2 b/src/octoprint/templates/tabs/control.jinja2
index e01e112c..0fa8e0fc 100644
--- a/src/octoprint/templates/tabs/control.jinja2
+++ b/src/octoprint/templates/tabs/control.jinja2
@@ -98,7 +98,7 @@
     <h1>{{ _('General') }}</h1>
     <div>
         <button class="btn btn-block control-box" data-bind="enable: isOperational() && !isPrinting() && loginState.isUser(), click: function() { $root.sendCustomCommand({type:'command',command:'M18'}) }">{{ _('Motors off') }}</button>
-        <button class="btn btn-block control-box" data-bind="enable: isOperational() && loginState.isUser(), click: function() { $root.sendCustomCommand({type:'command',command:'M106'}) }">{{ _('Fan on') }}</button>
+        <button class="btn btn-block control-box" data-bind="enable: isOperational() && loginState.isUser(), click: function() { $root.sendCustomCommand({type:'command',command:'M106 S255'}) }">{{ _('Fan on') }}</button>
         <button class="btn btn-block control-box" data-bind="enable: isOperational() && loginState.isUser(), click: function() { $root.sendCustomCommand({type:'command',command:'M106 S0'}) }">{{ _('Fan off') }}</button>
     </div>
 </div>