I have a Kenmore electric dryer that I recently replaced the thermostat on (2 weeks ago). Now the dryer has stopped heating again and cuts off after about 10-15 minutes during a pre-programmed cycle, without heating up. Any suggestions as to what the problem might be. Thanks for the help.

Sounds like you have a thermostat problem. Here is the general test procedure :

First check with a lamp or multi meter if there is power on the wall socket.
If so remove the rear panel, and have a look as to what is going on.

I assume that you last time removed all lint, and that air is following the proper route.
Check the drive belt : is it frayed?
Is the drum running against something?
Does anything look lose or broken?
Do a test run without any load : does the motor turn? Does the drum turn? Is the belt slipping? Is the heater switching on or not ?

Please be careful : do not touch anything while the dryer is connected to the power.
If you can not find anything, remove the power - take the power cable out of the socket and put it on the ground.

If everything seems fine your problem may be related to the thermostat cutting out.
The thermostat is always mounted near or against the heating element. To check the thermostat you need a Volt or Multi meter, and the knowledge how to operate one.
If faulty, just replace it.

If necessary come back to the board and discuss your findings!
Contact me by private mail (click on my handle and follow instructions) to draw my attention. I will than reply here again.
If this helps solving your problem, than please rate this reply.

Success !

:)