i have a Zan FS1555w it has no error code but it beeps 4 times and the end light flashes 4 times. I have looked in error codes but cant not find what beeps mean. The interlock has a burn mark on it so i changed the lock still the same. Check brushes, plug in new pump still the same. Without knowing what the code is i am just pissing in the wind. Please help as my trousers are getting very wet.