A loud, squeaking sound coming from a Whirlpool dryer is sometimes caused by foreign objects stuck in the drum, the dryer being on unlevel ground, or a dirty or off-track belt. It is recommended that the squeaking be addressed right away to ensure that major repairs are not necessary later.
The first step in figuring out the cause of the squeaking sound is to open the dryer and check the outside of the drum for foreign objects, such as coins or other small objects. Also, while the dryer is running, check to make sure it is not shaking, as this means that the machine is not on level ground. If neither of these problems is the case, unplug the dryer, and remove the screws from the top panel of the machine. Turn the drum to see if the belt is off its track and, if it is, turn the drum while placing the belt back into the groove.
If none of these solutions works, the belt idler may need to be cleaned to stop the squeaking. To do this, unplug the dryer, remove the screws underneath the lint holder and remove the cabinet. Then, remove the screws from the front panel, and take it off. Find the idler wheel that the belt is on, and apply two to three drops of lubricant oil to this device.