diff --git a/heat_control.py b/heat_control.py
index 918e97e..fa9cc32 100755
--- a/heat_control.py
+++ b/heat_control.py
@@ -117,8 +117,9 @@ def check_temperatures():
 		# and turn off the boiler of course
 		for c in contours:
 			mqtt_client.publish(c.out_topic, "1", retain=True)
-		mqtt_client.publish(boiler_control, "0", retain=True)
-		mqtt_client.publish(pump_control, "1", retain=True)
+		# boiler and pump relays are inverted in fact
+		mqtt_client.publish(boiler_control, "1", retain=True)
+		mqtt_client.publish(pump_control, "0", retain=True)
 		return
 	#
 	sum_t = 0
@@ -133,8 +134,10 @@ def check_temperatures():
 		logger.error("No temperatures available, switch to full-on mode")
 		for c in contours:
 			mqtt_client.publish(c.out_topic, "1", retain=True)
-		# turn on boiler 
-		mqtt_client.publish(boiler_control, "1", retain=True)
+		# boiler and pump relays are inverted in fact
+		# turn on boiler and pump
+		mqtt_client.publish(boiler_control, "0", retain=True)
+		mqtt_client.publish(pump_control, "0", retain=True)
 		return
 
 	for c in contours:
@@ -170,12 +173,13 @@ def check_temperatures():
 				any_opened_start = time.time()
 
 	logger.debug("Any opened: " + str(any_opened) + " aos " + str(any_opened_start) + " time " + str(time.time()))
+	# boiler and pump relays are inverted in fact
 	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)
+	else:
+		mqtt_client.publish(boiler_control, "1", retain=True)
+		mqtt_client.publish(pump_control, "1", retain=True)
 
 def main_cycle():
 	"""Main 5-second cycle"""