Re: Diplomat ADP4230
It sounds like your clock is stuck on auto – if you really can’t get it to come out of that mode then you may well be looking at either a wiring fault or a new clock; part number 082139700 and will cost you around £130.
Try holding the mode button in and pressing both the + and – buttons. other than that you might be as well getting someone out to look at it to see if they can reset it for you and check the wiring before considering costly spares.