diff --git a/src/state-summary/state-card-content.html b/src/state-summary/state-card-content.html
index 9579908eca..8c011bfcff 100644
--- a/src/state-summary/state-card-content.html
+++ b/src/state-summary/state-card-content.html
@@ -35,26 +35,14 @@ Polymer({
     'inputChanged(hass, inDialog, stateObj)',
   ],
 
-  _isLoaded: function (name) {
-    var elem = document.createElement(name);
-    // If Polymer was already loaded for <name> - it replaced the constructor.
-    return (elem.constructor !== HTMLElement);
-  },
-
-  _maybeLoadCustomUi: function (stateType) {
-    var isLoaded = this._isLoaded('STATE-CARD-' + stateType.toUpperCase());
-    // If Polymer component for the required element is not loaded try to load it.
-    // Don't try to load unconditionally because it cause onflict between vulcanized
-    // and non-vulacanized versions.
-    if (!isLoaded) {
-      this.importHref(
-          '/local/custom_ui/state-card-' + stateType + '.html',
-          function () {},
-          /* eslint-disable no-console */
-          function () { console.error('Error loading %s from /local/custom_ui/state-card-%s.html', stateType, stateType); },
-          /* eslint-enable no-console */
-          true);
-    }
+  _ensureCustomUILoaded: function (stateType) {
+    this.importHref(
+        '/local/custom_ui/state-card-' + stateType + '.html',
+        function () {},
+        /* eslint-disable no-console */
+        function () { console.error('Error loading %s from /local/custom_ui/state-card-%s.html', stateType, stateType); },
+        /* eslint-enable no-console */
+        true);
   },
 
   inputChanged: function (hass, inDialog, stateObj) {
@@ -62,7 +50,7 @@ Polymer({
     if (!stateObj || !hass) return;
     if (stateObj.state !== 'unavailable' && 'custom_ui_state_card' in stateObj.attributes) {
       stateCardType = stateObj.attributes.custom_ui_state_card;
-      this._maybeLoadCustomUi(stateCardType);
+      this._ensureCustomUILoaded(stateCardType);
     } else {
       stateCardType = window.hassUtil.stateCardType(hass, stateObj);
     }