Have a Kenmore 70 Series, Heavy Duty Dryer. Push the on button to start, nothing happens.

belt broke or heat switch is bad or door safety switch has gone out or the motor burnt up

It sounds like the hi-limit thermostate and/or the thermal cut-off is what is causing your dryer to shut down. Basically it's over heating. You should replace these two items togeather. Also the thermal cut-off will be triggered by a grounded out heating element. Here is a diagram of where these items are located. hope this helps
Figure W-6: Dryer Rear Access

test the thermal fuse in the back of the unit,, unplug it first ,, click on this link to see what it looks like http://www.partselect.com/dryer+dryer-wont-heat+repair.htm

SOUNDS LIKE A MOTOR BUT SOMETHING COULD BE CAUGHT IN THE BLOWER WHEEL SHROUD

Hi,
A dryer can not start for many reqasons...
This tip that I wrote will help you to figure out what is happening...

http://www.fixya.com/support/r4460438-dryer_repair_dryer_will_not_start

heatman101

I would check that fuse

If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

the drum belt may be broken. you will have to check this, it goes around the drum and the pulley on the motor. you could also have a bad motor.

can you hear the motor or does the unit humm or vibrate when it is turned on
if yes then have a look at the belt
if not it's time sor a service call

most of the time it is the door switch that goes bad,also you can check the main fuse inside the dryer on the blower box,and always make sure your dryer vent and wall vent are clear to vent,let me know what you find-mike

hi thanks for the question the belt has probably broken there should be a bottom panel use screw driver to pry the front on each side pry outwards remove panel now you should see a broken belt replace thanks the appliance dod