diff --git a/components/pid/temp_controller_smith.py b/components/pid/temp_controller_smith.py
index ca9dc27..59e0381 100755
--- a/components/pid/temp_controller_smith.py
+++ b/components/pid/temp_controller_smith.py
@@ -144,6 +144,7 @@ class TempController(APid):
 			if state_next == States.HEAT:
 				self.model.initial(self.theta_ist)
 				self.kalman_model.initial((self.theta_ist, 0))
+				self.kalman_model_delay.initial((self.theta_ist, 0))
 
 	def process_pid(self, theta_err, heatrate_err):
 		self.pid_hold.process(theta_err, -self.theta_ist)