diff --git a/soft/thermostat/src/mainwindow.cpp b/soft/thermostat/src/mainwindow.cpp
index 1690475..aed6fb6 100644
--- a/soft/thermostat/src/mainwindow.cpp
+++ b/soft/thermostat/src/mainwindow.cpp
@@ -262,12 +262,18 @@ void MainWindow::apply_order_to_heaters(void)
 
 void MainWindow::temperature_slot(int idx, double val)
 {
+	static bool temp_received[MAX_NB_ZONES];
+
 	Settings *s = Settings::getInstance();
 
 	qDebug() << "temperature idx:" << idx << " val: " << val << endl;
 	if (idx < s->nbZones()) {
 		m_zones.at(idx)->m_temperature_value = val;
 		m_zones.at(idx)->refresh();
+		if (!temp_received[idx]) {
+			temp_received[idx] = true;
+			apply_order_to_heaters();
+		}
 	}
 }