We had an excellent experience last night.
Our home still has the original furnace. That is a floor furnace with the vents on either side of the wall. Last night I went to turn it on and the key would not turn. I checked the pilot and tried again still nothing. I used my flashlight to look down inside of the unit and one of the kids (probably the two year old) had put paper and a couple of small toys down in it. Now this would not keep the key from turning but I took the coil claw and removed everything. After that, I tried to turn the key again to figure out what was wrong with the furnace and the key turned with no trouble. Personally I don't think the items could have caused a fire (the heater itself is enclosed) but I think our friend did. And you are right about the warm feelings. Our house has always felt homey. We have only been there for two years and yet it feels like it is the only "home" we have ever had.