Check the fuse box on your house. Most dryers use two different fuses, so it's possible the fuse controlling your dryer heat is blown, but the dryer is still turning.
Remove the front panel of your dryer with a screwdriver by unscrewing the screws on the underside of the dryer. Look either towards the back left corner or the right front corner of the dryer and locate the heating element, which looks like a coil or a group of coils that resemble springs . Use a multimeter to check for electricity by turning it on and pressing one probe to the heating element and one probe to a screw somewhere else on the dryer. If there is no electricity, you must replace the heating element.
Inspect the thermal fuse. This is located inside the dryer back panel of the Whirlpool at the exhaust tube. It looks like one-inch fuse attached to the panel with black resin, and if it has blown out it must be replaced.
Replace the power cord to your Whirlpool dryer. If you still experience trouble, replace the terminal block inside the dryer that the power cord is attached to.