Hello,I went to have a look at a Hoover HNL71463D a couple of weeks back it had a oc valve.Fitted new one and left got called back tuesday.The led display is counting upwards as if someone was holding there finger on the delay start.I took the front pcb out give it a clean up put it back together it would then start ok.Told her it might need a new front pcb but to just try it for now as it was working.Rings back tonight and its doing the same.Has anybody else come across this. 😕