diff --git a/app/gui/oven_control/preheatpopup.cpp b/app/gui/oven_control/preheatpopup.cpp
index 3641c1b..0f7526c 100644
--- a/app/gui/oven_control/preheatpopup.cpp
+++ b/app/gui/oven_control/preheatpopup.cpp
@@ -26,6 +26,8 @@ PreheatPopup::PreheatPopup(QWidget *parent, Oven *oven) :
     showCurrentTempTimer.setInterval(1000);
     connect(&showCurrentTempTimer, SIGNAL(timeout()), SLOT(showCurrentTemp()));
 
+    ui->humidityGauge->setMaximum(100);
+    ui->heatGauge->setMaximum(oven->maxTemp());
     ui->preheatGauge->setMaximum(oven->temp());
     ui->preheatGauge->setMinimum(oven->currentTemp());
     ui->preheatGauge->setValue(oven->currentTemp());