After waiting a couple of days for the local repair tech to come, I watched your outstanding repair video on Youtube and simply followed the problem isolation process. First checked that vents were completely clean, checked that the exhaust fan tied to drum was fully functional. Since the dryer would initially warm up but then cool before the clothes were dry, tried cleaning the sensors. Based on the problem I ordered a high/low temp coil which you guys shipped within a couple of hours and I received the following day. Took a bit of time to get the gas valve assembly out and replace the coil/solenoid but it was back together and running in about an hour.