Dryer runs fine does not dry proper run 2 or 3 times and still damp clothes vent was not clogged pl,ease help

Clogged Vent
If your dryer seems to run forever, it could be because of a clogged vent or internal ductwork. Your dryer may have an automatic cycle that turns off the dryer when the clothes are dry. It does this with a special thermostat or moisture-sensing system.
Normally, this is what happens during an automatic cycle:
The thermostat tells the dryer to heat until the interior of the dryer reaches a pre-set temperature--say 135 degrees.
When the dryer reaches the pre-set temperature, the thermostat tells the timer to begin advancing. (If there's a moisture sensor, the timer advances only if the moisture content of the clothing is low enough.)
The timer advances until the interior cools, then the thermostat tells the timer to stop advancing, and tells the dryer to start heating again.
This cycle continues until the clothes are dry. But...if the vent is clogged, the dryer may never reach the proper operating temperature, so it doesn't send the signal to the timer and the dryer continues to run indefinitely, even if the clothes are completely dry. To fix the problem, clean the vent and/or internal ductwork.
Heating Element
Your dryer's heating element may be partially burned out. If it is, your dryer still heats, but at such a low temperature that it takes three or four times as long to dry the clothes. If the element is partially burned out, replace the heating element. You can check for an ohm reading but will need to refer to the service manual for proper reading. This sometimes on the tech sheet located somewhere on the dryer. Usually between 9-13 ohms.
Cycling thermostat
Although this isn't a common problem, one of the thermostats that controls the temperature in your dryer may break and cause the dryer to heat poorly. If so, you need to replace it. The thermostat is usually a small, round, black device mounted to an oblong steel plate. The plate is mounted to the internal ductwork . This thermostat usually has four wires going to it. Check the 2 terminals that are opposite each other and are the closer together of the 2. These 2 terminals should have continuity. If not replace the thermostat.
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if you have checked vent all the way out to termination point and sure that it is clear and not obstructed with damp lint then i would say you possible have a bad thermostat on the heater... this regulates how often and how long the dryer heating element runs and stays off.it has a open temperature and a shut down temperature... i would suggest replacement of that first... it is located on the heating element of unit... it is a round disk shape like bi-metal with 2 wires attached to it...
good luck to you....

Your problem may be attributed to a clogged exhaust system (e.g.: clogged inside the dryer's vent, flexible vent behind dryer clogged and/or clogged inside wall, etc.).

Depending on how damp they are, it could be normal or you could have a plugged dryer vent. I say that because on these dryers, the software in the control is programed to leave cloths a little damp in the sensor dry. This is for energy efficiency and less shrinking on clothing. If they are coming out to damp and you need to run them through two cycles to dry them, then the vent is plugged, either in the dryer or the house, and needs cleaned out. When the vent is plugged, the moisture isn't getting out, and the cloths will not dry.

need to check your vent duct. if clogged it won't let the air flow through the dryer needed to dry your clothes.

Vents can fool you sometimes they seem to be ok but still cause problems. Try running with vent unhooked from machine one time and see if it works ok.
Check for leaks air leaks around the door or anywhere else.

If you have to run the dryer 2 to 3 times as long to dry the clothes then you just need to make sure the vent hose behind the dryer isn't kinked up and the vent is open all the way out side ,,, that will fix it for you.
Larry

check you vent hose all the way to outside. make sure not blocked or kinked.

take the vent hose out of your dryer and try to dry the clothes, if it works your dryer is fine and the vent is clogged

Corwyn, looks like the problem you are having is not with the dryer. The vent line is probably clogged up, which caused the moisture to stay inside the dryer. To make sure this is a vent problem, you can disconnect the vent hose behind the dryer and run it for one load with it disconnected. If it runs fine, then the vent line needs cleaning. Usually it needs special equipment and is very hard to do yourself. It would cost you around $90 to get a professional out to do it for you. Gendos....post back.