diff --git a/heat_control.py b/heat_control.py
index 8c1a5e5..adcd181 100755
--- a/heat_control.py
+++ b/heat_control.py
@@ -147,6 +147,7 @@ def check_temperatures():
 		# sensor is offline
 		if contour_t is None:
 			contour_t = sum_t / count_t
+			logger.info("Contour " + c.sensor_topic + " has no data from sensor, using others' average")
 		target_t = target_temp
 		if not c.target_value is None:
 			target_t = c.target_value
@@ -176,7 +177,7 @@ def check_temperatures():
 		boiler_out = 1
 		pump_out = 1
 	else:
-		logger.info("All contours are closed, shutting down boiler and pump")
+		logger.info("All contours are considered closed, shutting down boiler and pump")
 		boiler_out = 0
 		pump_out = 0