Hey Hydro any actual pictures your schematic is somewhat not very understandable......I am not going to try and build this for the fact that the schematic does not give specific pin numbers on relays and if in the USA black is hot white is neutral and green is ground I would not use speaker wire to wire this. cmon now thanks for your efforts but this tutorial is not geared towards the amature diy, any actual of the one you built. I know my spelling sucks oh well. Where you put TEMP is that the thermostat i am guessing it is. This seems to be slapped together do not try to build this or you may fry yourself..............good luck..............