Richard, sounds like main module failure (back of machine). We stock it ready programmed for ÂŁ59.88 + ÂŁ6 postage (exchange) and you can return it for a refund (less our ÂŁ12 handling) if it does not cure the fault. To order, go to our site and put WF840 in the search box or call us on 0115 9652118 Tony EMW Electronics
www.emwelec.co.uk
March 2013