Tricity bendix washing machine?

I set the washing machine to wash, start the process the machine operates fine the the yellow light on the panel starts to flash and bleep, I stop the machine return the program to off then set on rince thats fine then i have to go to the stop pos again and set to rince to finish cycle, I have cleaned all the pipes out cleaned the pump out, pulled all the contact off and re seated them to make sure i have a good contact, start the machine it will run through 3 washes then the problem starts again.