diff --git a/dht11.py b/dht11.py
index ac8ebc6..70990c4 100644
--- a/dht11.py
+++ b/dht11.py
@@ -24,7 +24,11 @@ sensor_data = {
     'fan': False
 }
 
+fan_timer_start = 0
+fan_timer_actief = False
+
 def check_data():
+    global fan_timer_actief, fan_timer_start
     while True:
         try:
             temperatuur_C = sensor.temperature
@@ -41,12 +45,19 @@ def check_data():
             GPIO.output(FAN_PIN, GPIO.HIGH)
             sensor_data['led'] = True
             sensor_data['fan'] = True
+            fan_timer_actief = False
+            fan_timer_start = 0
         else:
-            GPIO.output(LED_PIN, GPIO.LOW)
-            GPIO.output(FAN_PIN, GPIO.LOW)
-            sensor_data['led'] = False
-            sensor_data['fan'] = False
-
+            if sensor_data['fan'] == True and fan_timer_actief == False:
+                fan_timer_actief = True
+                fan_timer_start = time.time()
+                sensor_data['fan'] = True
+                GPIO.output(FAN_PIN, GPIO.HIGH)
+            if sensor_data['fan'] == True and fan_timer_actief == True and time.time() - fan_timer_start > 300: # 5 minuten
+                fan_timer_actief = False
+                fan_timer_start = 0
+                sensor_data['fan'] = False
+                GPIO.output(FAN_PIN, GPIO.LOW)
 
 class handler_class(http.server.BaseHTTPRequestHandler):
     def do_GET (self):