James, it will be the main module in the back of machine. We stock it at ÂŁ56.28 + ÂŁ6 post. If it does not sort the problem out, you can return it within 14 days for a refund, less our handling of ÂŁ12. To order, go to our site at www.emwelec.co.uk and put WMD940 in the search box or call us tomorrow on 01159652118. Tony EMW Electronics
Tony
November 2014