diff --git a/Puffer/module.php b/Puffer/module.php
index a01dcc4..715e972 100644
--- a/Puffer/module.php
+++ b/Puffer/module.php
@@ -64,11 +64,7 @@ class Puffer extends IPSModule
         $m = ($minVT - $maxVT) / ($minAT - $maxAT);
         $this->SetValue("Steigung", $m);
 
-        // Property auslesen
-        $at = $this->ReadPropertyInteger("Aussentemp");
 
-        // Wert in Variable setzen
-        $this->SetValue("Aussentemperatur", $at);
     }
 
     public function RequestAction($Ident, $Value)
@@ -165,7 +161,9 @@ class Puffer extends IPSModule
         }
         IPS_LogMessage("Puffer", "nach Glättung und vor AT berechnung");
 
+
         $at = $this->ReadPropertyInteger("Aussentemp");
+        $this->SetValue("Aussentemperatur", $at);
         $m = $this->GetValue("Steigung");
         $minVT = $this->ReadPropertyInteger("MinVT_Temp");  // z.B. 20
         $maxVT = $this->ReadPropertyInteger("MaxVT_Temp");  // z.B. 80
@@ -183,6 +181,8 @@ class Puffer extends IPSModule
         IPS_LogMessage("Puffer", "VT: ".$VT);
         IPS_LogMessage("Puffer", "m: ".$m);
         IPS_LogMessage("Puffer", "at: ".$at);
+        IPS_LogMessage("Puffer", "Property Aussentemp: " . $this->ReadPropertyInteger("Aussentemp"));
+        IPS_LogMessage("Puffer", "Variable Aussentemperatur: " . $this->GetValue("Aussentemperatur"));
 
         $boilerTemp = $this->GetValue("Boilertemperatur");
         $pufferLeistung = $this->ReadPropertyInteger("PufferLeistung");