Welcome to the crappy-Apollo club... ours goes into high-intensity convection mode and the only way you can turn it off is to open the door or un-plug the unit. It works in microwave mode but once the cycle is completed the above happens... VERY DANGEROUS IF YOU ARE NOT ATTENDING IT!
It went about about 18 days after the coach's / oven's 1 year warranty had expired. I've contacted both Heartland & Apollo:
Heartland's response was to contact Apollo.
Apollo's response was it's out-of-warranty so take it somewhere for repair.
None of the local appliance repair centers want to touch it! So, I called Apollo back to see if they could help me locate a local repair center & the only answer I got was that SOME Sears stores in the USA (I'm from Canada) might be able to repair.... THANKS!!
THE RANT: I am very disappointed that Heartland would install such a poor quality product in the coaches. Additionally, they block you in as it appears that you can't a reliable brand of convection / microwave that will fit in the cabinet opening.
The longer I have my Heartland product, the more I'm becoming less of a fan of Heartland as a quality manufacturer.
EH!