Answer Hello Shaji. If there is power coming to the 2 black wires of the timer motor, and the timer does not advance, replace the timer on the unit. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html Read More... Answered by AppliancePartsPros.com | Thursday, December 5, 2013