I have a Whirlpool model number LTE6234DQ5 that has a problem with the dryer. It takes 3 or 4 dry loads to completely dry our clothes. We've suspected the heating element and have inspected the coils. It's working properly but upon starting the dryer, the coils stop heating after a minute. After replacing the thermostat and the thermal cutoff attached to the heating element, the problem persists. What recommendations would you give?

A fairly common problem! The official instructions are

Before using your dryer, wipe the dryer drum with a damp cloth to
remove dust from storing and shipping.
1. Load clothes loosely into the dryer and close the door. Do not
pack the dryer. Allow space for clothes to tumble freely.
2. Turn the Cycle Control knob to the recommended cycle for the type of load being dried. Use the Energy Preferred Automatic Setting (,) to dry most heavyweight and medium weight loads. See "Drying, Cycle, and Temperature Tips."
3. Select a temperature setting on models with a Temp/Fabric selector. The cycle descriptions include temperature setting suggestions.
4. Push the START button.

Stopping and Restarting
You can stop your dryer any time during a cycle.
To stop your dryer
Open the dryer door or turn the Cycle Control knob to OFE
NOTE: The Cycle Control knob should point to an Off area when
the dryer is not in use.
To restart your dryer
1. Close the door.
2. Select a new cycle and temperature (if desired).
3. Press START

Extracted from
http://www.manualslib.com/manual/511763/Whirlpool-Lte5243dq.html?page=10#manual

Sounds like heating element may be grounding out.

Robyn, We would like to inquire further about your post with you. Please respond back to this email address [email protected] with your name, user id (Robyn), phone number, street address, zip code, reviewer name, model & serial number, and date of purchase on the appliance.

Try cleaning out the exhaust duct

check your dryer vent. it may be plugged with lint

If your dryer is heating, but you are experiencing longer dry times and poor drying efficiency, the following link can give you some items to check before you assume there is a malfunction with your dryer:

http://www.fixya.com/support/r3578821-dryer_takes_too_long_to_dry

The number one cause of dryer heat related problems is poor exhaust ventilation. If not vented properly, a dryer will not dry efficiently, will take longer than required to dry, and will cause the heating circuits to overheat to the point of failure. The dryer will actually seem hotter as the heating circuits begin to overheat. This is also the source of many fire hazards if not resolved. Read through the link provided and review some of the potential causes.

If you have any questions, please post back and let me know. Please include your MODEL NUMBER (if it is different from the one you listed this question under), so I can determine how your dryer is configured. I hope you find this information is helpful.

NOTE: If you thoroughly check everything and still have problems let me know. The problem could be related to a thermostat beginning to fail.

Lgm0923, we're sorry to learn of the experience that you've encountered with your Washer. Have you tried the troubleshooting suggestions on page 5 of your User Guide? The link is below. https://www.whirlpool.com/content/dam/global/documents/200311/owners-manual-3955869-RevB.pdf
If further assistance is needed, please email us your name, address, contact number, model and serial number at [email protected].

Check the venting going to the outside and the cover at the end make sure it is completely clear of lint.

Could also be centrifugal switch on motor.

I am online looking for an answer similar---our dryer doesn't heat....air comes out lukewarm and will not dry after 2-3 cycles.