I studied the heater and discovered the thermostat wire which carries 240 VAC was pinched to ground which caused the flash bang explosion. i cut the bad part of the wire away and hooked it up so I could remotely activate the heater. First time I powered the unit up it displayed a "P" and the fan ran without heat. Closing the leads with a jumper turned the heater on. I pressed the power to off. The "P" went away and the fan stopped running. I then jumpered the thermostat leads and nothing or so i thought. While doing a few other things in the greenhouse i noticed the overheat light came on. It looks like the fan doesn't turn on but the heating elements do. This is wrong. I took the heater down and started tracing out the controller board so i could add some enhancements to make this perform like a conventional furnace.
Dinner tonight was two mini pizzas that i made using Kroger crusts and some tomato, pizza cheese, frozen onions and tomato mushroom sauce. I did not taste the mushrooms.