Update is I disconnected the battery for an hour, still no joy at first. Pumps whirls for 10 secs or so, sat in the car turning to mar and off again, went and made a brew came out tried again and all OK !!??
Went on a 2 mile round trip, not sure it was changing down as it should but got home pulled in the drive reversed out again decided to park on the verge just in case. Tried it again about an hour ago and back to not being able to select !!!. Was this a coincedence when I disconnected battery or could have had an effect?, I've read about a terminal block on the 147s, could it be this and where would I find it?