diff --git a/freon@UshakovVasilii_Github.yahoo.com/extension.js b/freon@UshakovVasilii_Github.yahoo.com/extension.js
index 4fd0525..31bbbf1 100644
--- a/freon@UshakovVasilii_Github.yahoo.com/extension.js
+++ b/freon@UshakovVasilii_Github.yahoo.com/extension.js
@@ -169,20 +169,19 @@ class FreonMenuButton extends PanelMenu.Button {
 
         this.connect('destroy', this._onButtonDestroy.bind(this));
 
-        // don't postprone the first call by update-time.
+        // don't postpone the first call by update-time.
         this._querySensors();
 
         this._addTimer();
         this._updateUI(true);
         this._updateUITimeoutId = GLib.timeout_add(GLib.PRIORITY_DEFAULT, 250, () => {
             this._updateUI();
-            // readd to update queue
+            // read to update queue
             return true;
         });
-
-        GLib.timeout_add(GLib.PRIORITY_DEFAULT, 500, () => {
+        this._positionInPanelChangedTimeoutId = GLib.timeout_add(GLib.PRIORITY_DEFAULT, 500, () => {
             this._positionInPanelChanged();
-            return false; // 只执行一次
+            return false; // execute only once
         });
     }
 
@@ -564,6 +563,7 @@ class FreonMenuButton extends PanelMenu.Button {
 
         GLib.Source.remove(this._timeoutId);
         GLib.Source.remove(this._updateUITimeoutId);
+        GLib.Source.remove(this._positionInPanelChangedTimeoutId);
 
         for (let signal of this._settingChangedSignals){
             this._settings.disconnect(signal);
diff --git a/freon@UshakovVasilii_Github.yahoo.com/sensorsUtil.js b/freon@UshakovVasilii_Github.yahoo.com/sensorsUtil.js
index 90c6ca9..dbe689a 100644
--- a/freon@UshakovVasilii_Github.yahoo.com/sensorsUtil.js
+++ b/freon@UshakovVasilii_Github.yahoo.com/sensorsUtil.js
@@ -24,6 +24,7 @@ export default class SensorsUtil extends CommandLineUtil {
                     let lineRemoved = this._output.filter(l => l.trim() !== ',').join('\n');
                     let errorRemoved = lineRemoved.replace(/ERROR.*Can't read/, "");
                         errorRemoved = errorRemoved.replace(/ERROR.*I\/O error/, "");
+                        errorRemoved = errorRemoved.replace(/NaN/, "0");
                         data = JSON.parse(errorRemoved);
                 } catch (e) {
                     logError(e);