I have a house which was built in the early 1950's. It had one of those back to back floor furnaces in the hallway and living room, I would like to get rid of it but its to costly, is there a way I can clean it out because its making my kids and I sick every time we turn it on and not to mention I'm scared one of my kids will fall if its been walked or stand on, can anybody please help? Thanks.

it out because its making my kids and I sick every time we turn

You better have it professionally serviced. I think the problem may be more dangerous than just a cleaning will resolve.