GE Refrigerator Mode#l GSS25LGM the refrigerator side froze( even with temp turned all the way down). The water dispenser filter froze, cracked and leaked water into unit. What could be the casue of frig side freezing?

If one single spot in your fridgerator were getting froozen i would tend to say it would be a sensor but seeing how you have so much ice, there is a small door called the damper door that has a control to it located in the back left corner of the refrigerator this door opens and closes letting the cold air into your frigerator and it opens and closes by a contol that is also located on the ceiling of your refrigerator here is the schematic of the refrigerator side of your machine http://www.searspartsdirect.com/partsdirect/partsdirect/showSubComp.pd?imageUrl=http%3a%2f%2fc.searspartsdirect.com%2flis_png%2fPLDM%2fG0208726-00007.png part number 453 in this diagram is the thermostat harness also parts 402 would have to be checked as well as 459 its basicly an air flow system and the problem is the door is staying open to long you have to be able to inspect what the door is not doing if either the door is restricted by an ice build up or the control is no longer working if you have any further questions message me back and please remember to rank how this opinion has helped when our chat has fully concluded Thanks Rick