If they keep putting all these elements into powder toy you wont have to make anything, eventually there would be a "car" element and when you put it there would be car. The whole purpose of this game is to make the heater or cooler or whatever your making so i am disagreeing with this suggestion -1.
We closed the elements suggestion area for a reason, I can only suppose.
First of all, this element already exists. You can make a startlingly potent heater with clone, plasma, black hole, and heat switch if you can't be bothered to simply fill it with GOL.
If you think using GOL is too hard for a switchable heater and cooler, then try learning how it works instead of requesting new elements to destroy the fun of the game. Making lasers isn't easy, but we don't make an element that only shoots photons in one direction because drawing pixels of void is difficult. Making purple photons in a laser isn't simple, but we're not updating FILT to have them because it would defeat the point of building around it.