Whirlpool AWZ7913 Not Working

It just wont start. Put the load in, turn the dial to 90′. The start (pause) light flashes green and when I push the Start (pause) button the following lights light up but not solid lights, they are faded – gentle / clean filter / 3hr / 9hr / clean heat exchange. But then if I select 40′ the the start flashes as before but now the clean filter and clea heater exchange light up faded an without pressing start . When start is pressed all light up as before. Sorry for making things sound unclear but that’s how the dryer is treating me. Maybe someone will know were to start with it or what the lights mean. Obviously I’ve cleaned the filter, heat exchange, moisture sensor. Thanks