How do you add rinse to modle ALW480DA - Amana ALW480DA Top Load Washer

just press the botton of each cycle want u want,like add rinse press rinse botton and it will add rinse,press spin botton it will add spin,but for washing,cant coz already set the time,default program for wash and cannot change

What is the model number of the unit?

You have to do it manually. See below from manual:

Liquid Fabric Softener (Manually add during rinse cycle)
1. Turn OPTIONS knob to FABRIC SOFTENER
2. Measure liquid fabric softener carefully, following instructions on the bottle, and add during the rinse cycle.

OPTIONS (on some models)
Set this option when planning to manually add fabric softener during the rinse cycle or when you use extra detergent or bleach to clean hazily soiled items. It provides an enhanced rinse.

most likely water valve is bad

Humming could mean a stalled motor. These machines also have a coupling between motor and gearbox which can fail. However, the pump is attached to the motor, so if it's not pumping it probably means the motor isn't spinning. Check motor and/or gearbox.....Nomess

sounds like a case of over soaping especially if your water is soft. this is usually a front loader problem but..
Epsom salts added to the final rinse usually does the trick as it breaks down the oxygen loaded foam.
Very common problem in Launderettes.

you need to remove 3 or 4 bolts out of pump mount and slide pump down on shaft string belt and push pump back up and reinstall bolts in pump

Call a repiar shop.. Give them the modle & serial. They can find out if its in warrenty aany might be able to fix it for at no cost to you.

Yes. It is a timer. A lot of time though, the washer stop because the lid control switch is open. I means the washer has a sensor to stop when the lid is open or when the spin go widely unbalanced. Sometimes this sensor is too sensitive to vibration and stop the machine. The switch is in the back just behind the timer.

Sounds like the water seal is damaged and the leaking water has damaged the top bearing which is just below the water seal. You will need to have the hub & seal kit replaced.