When the Whirlpool dryer belt needs to be replaced, the following steps can be taken. First of all, for safety reasons, make sure that the dryer has been powered off and the power plug has been unplugged. This is a very important step to avoid any accidental electric shock or other accidents during the replacement process. Then, open the rear or top cover of the dryer. The specific location may vary according to different brands and models. It is recommended to refer to the user manual to determine the correct position. If you are not sure about the location of the cover, you can also look for relevant information on the official website of Whirlpool or consult customer service. After opening the cover, you can see the belt. Check whether the belt is loose or damaged. If the belt is found to be broken, worn seriously, or has obvious signs of aging, it is necessary to replace it with a new belt. When removing the old belt, you can gently pull it by hand. If it is stuck tightly, you can also use a small knife or other tools to assist in the removal, but be careful not to damage other components inside the dryer. After taking out the old belt, take out the new belt and put it between the drum and the drive shaft. Make sure that the new belt is completely set on the drum and fits closely with the drive shaft. During this process, pay attention to the installation position of the belt to ensure that it is not skewed or misaligned, otherwise, it may cause abnormal operation of the dryer. Next, use a tool, such as a screwdriver, to adjust the tensioner. The tensioner is usually a small metal piece, and by adjusting it, the new belt can be tightened, but do not make it too tight. If the belt is too tight, it will increase the load on the motor and other components, which may reduce the service life of the components; if the belt is too loose, it may cause the drum to rotate abnormally or even fail to rotate. Finally, after completing the above mentioned operations, close the dryer cover, and then reconnect the power plug to test. Observe whether the new installed belt can operate normally, and listen carefully for any abnormal noise. If there is any abnormal situation, stop using it immediately and check whether there are any problems in the installation process. If you are not sure that you can complete the belt replacement operation safely, in order to avoid causing more serious damage to the dryer, it is recommended to invite a professional technician to complete this task.