Try holding start & on/off button for 12 seconds. If that does not work, you will need to replace your main module. We stock them, ready programmed for your model number at ÂŁ65.88 inc postage (exchange). To order go to our site at www.emwelec.co.uk and put WF620 in the search box or call us on 0115 9652118. Tony EMW Electronics
www.emwelec.co.uk
April 2012