When I opened the rear cover and check the temperature sensor, I noticed the wire connection was damp. I dried it up with a hair dryer and it worked again for a few days. Then the problem came back.
When I gone back to inspect the second time, i noticed a lot of water on the floor. I knew there was a leak. I followed the disassemble samsung washer video from "Repair clinic.com" to open the top cover, then i realized the assembly hose was busted.
I ordered the parts from this site and it's up an running now with no problems.