If your electric clothes dryer stops heating properly, or your dry times are lengthy, then your heating element could be at fault.
Heat Element Test
Step 1- Shut off power to the appliance.
Disconnect your power plug for safety, as dryers operate on 240 Volts, plenty enough voltage to cause serious injury or damage.
Step 2- Locate the heating element.
Locate where the heat element is located on the dryer. This can usually be found by reading the owners manual part diagram.
Step 3- Disconnect the heating element.
Disconnect the two input wires to the element. As pictured below, the arrows are pointing to the contacts.
Step 4- Measure resistance across the contacts.
Place a meter lead on each contact. The readout should display some amount of resistance through the element. If you read an open on the meter display, then the element is electrically broken. If the readout is zero Ohms, then the heater's inner metal is shorted to the outside metal. A shorted heating element is dangerous and should not be used again. If you discover your heating element is either open or shorted, then it's time to purchase a new element.
Step 5- Check for wire damage.
If the element tested good, reconnect the element and start scanning for wire damage. If wire damage is found, repair using this wire repair guide.