I recently bought a house with a heatform fireplace in it. It doesn't Seem to have a switch on the wall to the fans anywhere. There is a plate in the bottom of the inside of the fireplace, is it possible that it's a n access to a thermoswitch maybe? This also has the copper gas pip running into it for lighting. I plan to install an insert at some point but may have to wait until spring but would like to use it if it's blowers do work that way. Thanks for any help