A broken belt could be the reason why your Whirlpool 29 inch electric dryer is not tumbling.
Let’s say that you load the dryer with wet clothes and turn it on to dry the clothes. If when you check the clothes they are still wet, you need to check the tumbler driving belt to see if it is broken or stretched.
To check it do the following. Set the timer on the beginning of a drying cycle, open the dryer door and with one hand push in the door switch actuator to turn it on. Push the start switch to turn the motor. If the motor runs ok but the tumbler won’t turn, you need to check the belt.
Disconnect the dryer from the wall outlet. Remove the lint filter, and the 2 screws under the lint filter cover. Now open the top panel and lean it against the wall.
Look on top of the tumbler and grab the belt to see if it is broken, if it is broken you will need to replace it.
To replace it do the following. Remove the two 5/16 screws holding the front panel, Pull the front panel out to clean the front of the tumbler and lift the front panel to disengage it from the 2 holding hooks and remove it.
Place the drum or tumbler on top of the two drum support rollers. I use a piece of coat hanger wire to hold the drum in place to make it easier to complete the installation. I will show you how to use the wire in my video.
Place the belt around the drum making sure that the grooves are facing the drum. Install the idler pulley in place.
Install the front panel and secure it with the 2 holding screws. Remove the coat hanger wire from the drum and close the top panel.
Screw in the two screws under the lint filter cover and install the lint filter.
Before buying any replacement parts you need to watch the video that explain how to check & replace this part. Once you know how to do this and you are sure that the part is bad. Then you could get the new part and replace it.
Click on the video below and watch it a few times until you know for sure how to check& replace the belt.
Below are the links to the parts needed for this repair.