What is the depth of a Bosch SHU5315UC Dishwasher

There are several places on-line where you can find this parts. Depending on where you are. For example you can look up www.dlpartsco.com

Long running time on a Bosch dishwasher is almost always a blown solder joint at the heater relay on the control board. You can resolder the joint, replace the relay or replace the control. Control board part number is 00266746.

Depending on age and other factors; key pads do wear out and require replacement. Many of these controllers us a silicone positive touch system like the keypad on a computer. Others use a direct contact system that has a spring action and contact points. If the later fails, it can be due to use, a breakdown of the recoil system, or damaged contacts.

need to change board which make the machine go threw the cycles

Refer your user guide for the error message meaning. Take service center help if you find complicated.

However you check the water inlet for free flow into the machine!

There will adjustment in the respective compartments for reducing or increasing the detergents. Adjust this. Refer manual. Finally have a look at the inlet water quality for excessive calcium!

make sure 120 degree water enters the diswasher

be shure its not under the rework

Bosch generally drys through evaporation from hot water rinse. There is a common circuit board issue where a cold solder joint on the heater relay pops.The water does not heat sufficient to evaporate any longer. Consult your manual for self diagnosing trouble shooting codes or go to appliance aid.com.
If the board connection is the issue I have repaired several, however Bosch recommends replacement only and sometimes supplies the parts free.