Alan C Mcdonough , GA March 20, 2015 Appliance: Model LG DLE3777W Extended drying times Dryer was taking 3-4 cycles to complete one load, not enough heat. A friend of mine is a appliance repairman and he told me to check for lint buildup in the dryer and vent. I checked the lint screen in the front as we do for each load and disconnected the flexible discharge hose on the back and with a flashlight verified no obstructions. I then reached into the discharge hose and as far into the pipe in the wall and came up with a handful of lint, nothing major. At that point I unplugged the dryer and pulled it out to access the back of the unit. With a phillips screwdriver I removed the screws around the perimeter of the back panel. I found that the back panel is not detachable or I could not remove it. I then unscrewed the clip holding the vent tube from the back of the unit. Then pulled the tube straight out. With a flashlight I located the thermostat to the left and the thermistor straight ahead. With a magnetic screwdriver I unscrewed both parts and removed them. The screws are very small and once you have your arm in the vent tube hole you need to use the small peep holes on either side of the vent hole to see your work. Once parts were installed connected vent ran a test load only to find my issue not resolved. Traced vent pipe in wall to attic and separated a joint there. Found the tube 80% blocked with lint, with a extendable pole with a round brush forced lint down to shop vac inserted in vent pipe. Once cleaned reattached attic joint ran another test and issue was resovled. If your issue is similar to this I suggest you dissconnect the vent hose and run a full cycle as I only ran mine 5 min feeling by hand and deciding unit not getting hot enough. That being said, I am well pleased with the services of AppliancepartsPros.com. They show you items currently in stock so no wondering if your order can be filled. And they have the best shipping turn around times of any .com. Thanks AppliancepartsPros.com 262 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes