Whirlpool gas dryers no longer have the flame-ignition, standing pilot light they once had. If you have an older model, however, it will likely have such a pilot light. The pilot on a Whirlpool gas dryer ignites the incoming gas. The flame created is what dries your clothes. If your dryer is running, but there is no heat coming from the unit, the pilot light may be out. Lighting a standing pilot light is a task any home DIYer can accomplish. The instructions are usually printed on the panel near the pilot-light orifice.
Confirm that the gas valve for the dryer is turned to the "On" position.
Turn the valve on the pilot-light orifice, located underneath the unit, counterclockwise to the "On" position.
Press down the ignite lever or button and light your lighter. Hold the lighter in front of the pilot-light orifice until it catches flame.
Hold down the lever or button for another 45 seconds to a minute, then release. The pilot light should stay lit. If not, turn the control valve clockwise one turn and wait five minutes before attempting to light again.