My emerson MO MW8992-RD suddenly stopped heating food. Is there something I can do to repair it? The electrical parts arr working up to and including the lights....however, triefd many things including water and nothing gets warm. The last we used it was 2 hrs ago, and, now, it does not heat. I have had the unit for many years, and I love it. Hope you can assist me. Thank you, Sandy Duncan...kayakmad2003@yahoo.com