diff --git a/js/component/card/system.js b/js/component/card/system.js
index 6400c15..542e774 100644
--- a/js/component/card/system.js
+++ b/js/component/card/system.js
@@ -317,7 +317,7 @@ beestat.component.card.system.prototype.decorate_time_to_temperature_ = function
   );
 
   // Convert "heat_1" etc to "heat"
-  const simplified_operating_mode = operating_mode.replace(/_\d/, '');
+  const simplified_operating_mode = operating_mode.replace(/[_\d]|auxiliary/g, '');
 
   /**
    * If the system is off or if we've already reached the setpoint, don't show