diff --git a/Firmware/ultralcd.cpp b/Firmware/ultralcd.cpp
index 18ac7cdf4..4f75d0930 100644
--- a/Firmware/ultralcd.cpp
+++ b/Firmware/ultralcd.cpp
@@ -6909,6 +6909,7 @@ static bool lcd_selftest_manual_fan_check(int _fan, bool check_opposite,
 
 
 		manage_heater();
+		manage_inactivity(true);
 		_delay(100);
 
 	} while (!lcd_clicked());