Whichever program I run on the DI 67 after 10 minutes I get a series of beeps and 2 central display lights flash. The wash cycle is never completed. I have checked filter - ok; Motor - ok; Pump - ok; no leaks on hoses and very occasionally there is water at the bottom when it fails. Is this the programmer? it is an analogue one. How easy would it be to replace and how costly? Thanks, Peter