I have a Whirlpool dryer model LGN2000PWO. It

Tara, We are sorry to hear about your Dryer. We are happy to look into your concerns but we will need your address, phone number, the model and serial number, the website you were contacted on, Fixya, your review ID, and date of purchase emailed to [email protected].

Reach inside the dryer and turn the drum. Does it turn easily? If not then it might be rollers or idler or drum glide worn out. Even if the motor needed replacing I would do it on this mdel. Nothing newer is worth a dayum in today's market. You can also try and lube the motor if it is getting hot and quitting. I have some links here:

Help! My dryer is growling at me, won't go!
Kenmore/Whirlpool Old school Dryer repair tip

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my dryer sensing light was on and dryer would not start, we replaced the sensor fuse and now it works the fuse is in back of dryer close to the bottom on the left hand side very easy to replace cost $11.00 by the way don't call whirlpool they have no clue, wanted to send repair man out to fix it.

Get the rear cover off and check the fuse

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IF THE DRYER HAS A DRY SENSOR INSIDE THE TUB CLEAN IT WITH A LITTLE ALCOHOL IF YOU HAVE OWNERS MAN CK FOR LOCATION IF NOT LOOK TOWARDS THE REAR OF THE TUB SMALL DISK SHAPED USUALLY

I had the same problem. I called the repair man and my heating elements were broken, I had them replaced and now my dryer works fine. For me getting it repaired was cheaper then buying a new one. Your repair man should give you a free estimate on the cost

there is a sensor in the exhaust line in the dryer, near the motor. this tells the heating element to shut off when it gets to a certain temp, either during reg cycle or if the exhaust gets clogged, it is meant as a safety measure, but it sounds like yours is bad so the heating element never shuts off. it is not an expensive part and easy to replace

it could be a bad: heating element or internal temperature switch. but i would turn you circuit breaker in your house off then back on first. sometimes the dual breaker will trip only one side leaving you with a partially functioning machine. 
·                                 I like this quote from fixitnow.com
by Samurai Appliance Repair Man
 
dryer runs but doesn’t heat, don’t even think it’s the thermal fuse. If the thermal fuse was the problem, the dryer wouldn’t run at all. 
First thing to do is verify your source voltage for the dryer; for those of you in Manhattan, this means to use your multi-meter to measure the voltage at the dryer outlet to make sure you have 240v. Y’see, Slick, the dryer motor only needs 120v supplied by one of the lines to run. But the heating elements, on the other hand, need 240v supplied by both lines to get hot. 
If the source voltage is ok, then the most likely bad parts are listed below. As always, you should use your meter and the tech sheet supplied with your dryer (and cleverly hidden inside the control panel) to verify: 
1. Even Heat Board 
2. Heater Relay 
3. Thermostat 
4. Sensor

what size is your breaker how many amps it should say on breaker are you cleaning the lint screen with it on top if the drier is getting too hot there is a device in it that's called a thermal limiter that would blow before the breaker would trip what kind or you in a house or apt. now on high heat can you hold your hand on the side of the drier.or cant touch it look at the vent under your house and tell me 1is it hanging down under the house then coming up to the hood 2whats its diameter3whats it made of we will go from there ok.there are three thermostats in that drier the first one runs at about 150 160 max second is a safety in case the first one fails it cycles at about 250 third is a safety if the drier exceeds 300 it will shut the heater down and wont rest it has to be replaced

The vent is clogged.