Electric dryer goes through cycle and stops but doesn’t cool down?
Here are your parts
http://www.appliancepartspros.com/partsearch/modelsearch.aspx?model=GEW9878PW1
See the attachment for the tech sheet
How do you shut the heater off?
I would check for a grounded element.
When the motor stops the centrifugal switch (2M/1M) should open removing power from the heating coils.
Check the heating coil.
Unplug the unit and both wires to the coil.
Check it with a meter, each element should be around 20 ohms.
Then check from each side of the coil to the case/frame, both should be infinite ohms (open). If not the coil may have sagged or broken and is touching the case so it is powered by 120 volts.