Perform regular maintenance
Lint can build up easily in a dryer, interfering with the appliance's operation and even posing a fire hazard. Lint buildup also hinders the dryer's ability to vent heat to the outside and keeps the dryer from working to its fullest capacity. On a regular basis, check the dryer vent that runs from the back of the dryer to the outside, and clean out all lint.
Check the operating thermostat
The dryer's operating thermostat measures the heat inside the dryer drum and turns the heating elements on and off to maintain a steady temperature. A failing thermostat can prevent the dryer from heating properly. Fortunately, the thermostat is one of the dryer repair parts you can easily find at Sears PartsDirect.
Check the heating element
In an electric dryer, the heating element is what provides the heat needed to dry your clothes. Often, damage to the heating element is visible, so unplug the dryer and check it out for any signs of breakage as part of your dryer troubleshooting routine. Replace the heating element if you spot any damage.