diff --git a/brewpi.py b/brewpi.py
index f3cbefc..9323599 100644
--- a/brewpi.py
+++ b/brewpi.py
@@ -92,7 +92,7 @@ class HeaterTask(ATask):
 			self.heater.process()
 			power.set(round(self.heater.getPower()))
 			if power.is_changed():
-				await self.send({'Power': power.get(), 'Activate': int(self.heater.getPower() != 0)})
+				await self.send({'Power': power.get(), 'Activate': int(self.heater.is_activated() != 0)})
 			await asyncio.sleep(self.interval)
 
 
diff --git a/components/actor/heater.py b/components/actor/heater.py
index c0be6a4..01662b4 100644
--- a/components/actor/heater.py
+++ b/components/actor/heater.py
@@ -17,6 +17,9 @@ class Heater(AHeater):
 	def activate(self, enable):
 		self.is_active = enable
 
+	def is_activated(self):
+		return self.is_active
+
 	def process(self):
 		self.power_eff = self.power_set if self.is_active else 0
 
diff --git a/components/aheater.py b/components/aheater.py
index 9b9904e..4c637d9 100644
--- a/components/aheater.py
+++ b/components/aheater.py
@@ -18,6 +18,10 @@ class AHeater(AttributeChange):
 	def activate(self, enable):
 		return None
 
+	@abc.abstractmethod
+	def is_activated(self):
+		return None
+
 	@abc.abstractmethod
 	def process(self):
 		pass