diff --git a/config.json.sample b/config.json.sample
index eb6e836..159ed7d 100644
--- a/config.json.sample
+++ b/config.json.sample
@@ -6,31 +6,33 @@
 	"contours": [
 		{
 			"sensor": "/devices/workroom_weather/controls/t",
-			"control": "/devices/wb-gpio/controls/EXT1_R3A1"
+			"control": "/devices/wb-gpio/controls/EXT1_R3A6"
 		},
 		{
 			"sensor": "/devices/bathroom_weather/controls/t",
-			"control": "/devices/wb-gpio/controls/EXT1_R3A2"
-		},
-		{
-			"sensor": "/devices/entrance_weather/controls/t",
-			"control": "/devices/wb-gpio/controls/EXT1_R3A3"
-		},
-		{
-			"sensor": "/devices/corridor_weather/controls/t",
-			"control": "/devices/wb-gpio/controls/EXT1_R3A4"
-		},
-		{
-			"sensor": "/devices/techroom_weather/controls/t",
 			"control": "/devices/wb-gpio/controls/EXT1_R3A5"
 		},
+		{
+			"sensor": "/devices/entrance_weather/controls/t",
+			"control": "/devices/wb-gpio/controls/EXT1_R3A1"
+		},
+		{
+			"sensor": "/devices/corridor_weather/controls/t",
+			"control": "/devices/wb-gpio/controls/EXT1_R3A2"
+		},
+		{
+			"sensor": "/devices/techroom_weather/controls/t",
+			"control": "/devices/wb-gpio/controls/EXT1_R3A4"
+		},
 		{
 			"sensor": "/devices/kitchen_weather/controls/t",
-			"control": "/devices/wb-gpio/controls/EXT1_R3A6"
+			"control": "/devices/wb-gpio/controls/EXT1_R3A3"
 		}
 	],
 	"target_temperature": 21.0,
 	"hysteresis": 0.5,
 	"boiler_exhaust_t": "/devices/wb-w1/controls/28-000000860adf",
-	"boiler_control": "/devices/wb-gpio/controls/EXT1_R3A8"
-  }
\ No newline at end of file
+	"pump_control": "/devices/wb-gpio/controls/EXT1_R3A8",
+	"boiler_control": "/devices/wb-gpio/controls/EXT1_R3A7"
+  }
+  
\ No newline at end of file
diff --git a/contour.py b/contour.py
index 86b617a..1121e69 100644
--- a/contour.py
+++ b/contour.py
@@ -8,10 +8,12 @@ class Contour:
 	value_time = 0
 	state = None
 	state_change_time = 0
+	target_value = None
 
 	def __init__(self, config, logger):
 		self.sensor_topic = config['sensor']
 		self.out_topic = config['control']
+		self.target_topic = config['target']
 		self.logger = logger
 
 	def update(self, value):
@@ -29,4 +31,8 @@ class Contour:
 		if (self.state is None) or (time.time() - self.state_change_time > self.CHANGE_FREQ):
 			self.state = state_value
 			self.logger.info("Contour " + self.sensor_topic + " changed state to " + str(self.state))
-	
\ No newline at end of file
+	
+	def update_target(self, target_value):
+		self.target_value = target_value
+
+	
diff --git a/heat_control.py b/heat_control.py
index 5c6b9ca..f4453a1 100644
--- a/heat_control.py
+++ b/heat_control.py
@@ -43,7 +43,7 @@ logger = logging.getLogger(__name__)
 
 def load_config():
 	"""Load configuration from file"""
-	global config, contours, target_temp, boiler_control, hysteresis
+	global config, contours, target_temp, boiler_control, hysteresis, pump_control
 	try:
 		with open(CONFIG_FILE, 'r') as f:
 			config = json.load(f)
@@ -52,6 +52,7 @@ def load_config():
 		target_temp = float(config.get('target_temperature'))
 		hysteresis = float(config.get('hysteresis'))
 		boiler_control = config.get('boiler_control')
+		pump_control = config.get('pump_control')
 		if (boiler_control is None):
 			logger.error("Boiler control not configured")
 			exit(1)
@@ -74,6 +75,7 @@ def on_connect(client, userdata, flags, rc):
 		# Subscribe to all temperature sensor topics
 		for k in contours:
 			client.subscribe(k.sensor_topic)
+			client.subscribe(k.target_topic)
 			logger.info(f"Subscribed to: {k.sensor_topic}")
 		# and boiler exhaust topic
 		client.subscribe(config.get('boiler_exhaust_t'))
@@ -89,6 +91,10 @@ def on_message(client, userdata, msg):
 				temperature = float(msg.payload.decode('utf-8'))
 				k.update(temperature)
 				logger.debug(f"Updated {k.sensor_topic}: {temperature}°C")
+			if (k.target_topic == msg.topic):
+				temperature = float(msg.payload.decode('utf-8'))
+				k.update_target(temperature)
+				logger.debug(f"Updated target {k.target_topic}: {temperature}°C")
 		if msg.topic == config.get('boiler_exhaust_t'):
 			boiler_exhaust_t = float(msg.payload.decode('utf-8'))
 			logger.debug(f"Updated boiler exhaust: {boiler_exhaust_t}°C")
@@ -106,12 +112,14 @@ def check_temperatures():
 	# check boiler exhaust, turn off if too big
 	if (boiler_exhaust_t > BOILER_EXHAUST_LIMIT):
 		logger.error("Boiler exhaust overheat")
-		# will open all contours (to force coolant circulation)
+		# will open all contours (to force coolant circulation),
+		# turn on the pump
 		# and turn off the boiler of course
 		for c in contours:
 			# valves are normally-opened, so 0 means "open"
 			mqtt_client.publish(c.out_topic, "0", retain=True)
 		mqtt_client.publish(boiler_control, "0", retain=True)
+		mqtt_client.publish(pump_control, "1", retain=True)
 		return
 	#
 	sum_t = 0
@@ -137,10 +145,13 @@ def check_temperatures():
 		# sensor is offline
 		if contour_t is None:
 			contour_t = sum_t / count_t
-		if contour_t < target_temp - hysteresis:
+		target_t = target_temp
+		if not c.target_value is None:
+			target_t = c.target_value
+		if contour_t < target_t - hysteresis:
 			# should turn on contour
 			c.check_state(True)
-		if contour_t > target_temp + hysteresis:
+		if contour_t > target_t + hysteresis:
 			# should turn off contour
 			c.check_state(False)
 		if c.state:
@@ -161,8 +172,10 @@ def check_temperatures():
 
 	if any_opened and time.time() - any_opened_start > BOILER_TURN_ON_AFTER:
 		mqtt_client.publish(boiler_control, "1", retain=True)
+		mqtt_client.publish(pump_control, "1", retain=True)
 	else:
 		mqtt_client.publish(boiler_control, "0", retain=True)
+		mqtt_client.publish(pump_control, "0", retain=True)
 
 def main_cycle():
 	"""Main 5-second cycle"""