The parts needed to repair a Whirlpool dryer depend on what is causing the appliance to malfunction, and what kind of dryer it is. Whirlpool offers both electric and gas dryers, which have different parts to operate the different heating systems.
Common problems that affect dryers include: not drying well, no or low heat, drum doesn't turn, drum doesn't stop turning while door is open, dryer operates at excessively hot temperature, and noisy operation. Diagnosing these symptoms is the first step in determining what parts are needed, if any, to repair the unit.
If the dryer is not producing sufficient heat, it may have a clogged air vent in the system; clearing this does not require any parts. It might also indicate that the thermostat of the unit is malfunctioning and needs to be replaced. Likewise, if the dryer is producing too much heat, the temperature control system may need to be swapped out.
Issues the inhibit the tumbling drum from turning can stem from the drum support, drum belt or drum motor being damaged. Noisy operation, a particular problem for Whirlpool brand dryers, is also indicative that the drum support is giving way. This causes the rotating drum to come into contact with other internal dryer components.