Twin Star Fireplace model 33EF010GRA - I turn on the power switch and only the down light comes on?

SOURCE: I turn my fireplace on and it works fine until I

probally a thermocouple

SOURCE: The switch that turns on

I'm sorry, but we don't sell any parts or appliances here on FixYa. We simply provide information on how troubleshoot and/or repair many things. With that said, I can tell you, from what you described, you need more than just and ON/OFF Switch, if in fact, it "burned out". Something else electrically is wrong with your electric fireplace-heater to cause that.

Unfortunately, you failed to mention the Model Number of your Charm Glow Fireplace, so I can't steer you, to where you may be able to find a replacement switch. If you can provide that information, I may be able to help you.