My Kenmore "Laundry Center" stackable washer dryer unit displays error code "E6". The dryer goes for 10 minutes or so, then stops and displays E6. If I wait (perhaps it cools down) a few minutes it will dry for a 10 more minutes or so and then stop with E6 again. It's model # is 417.99190800 (W12710906)... Probably close to 20 years old or so.