I have a 1977 Avion Travel trailer. It has a 3,000 BTU Suburban NT-30 Furnace. It has a 3 wire hook up for the power and thermostat. If I bought a new one to replace it, I would have a 4 wire hook up on the new furnace. Anyone out there ever make this swap? What about the 4th wire?
2007-08-17 14:51:35 · 1 answers · asked by Terry C 1 in Cars & Transportation ➔ Maintenance & Repairs
I forgot to add that this furnace is all 12 volt. There is no A/C power to it at all. 12VDC fan, fuel valve etc. So I can only assume the 4th wire may hook into the fan. I hear that some of the newer ones have a heat sensor that tell the fan to come on if the temp in the trailer get too high. Not sure bout that though ????
2007-08-17 15:33:10 · update #1
That is the new requirement for plugs. You have the two power wires the neutral and the ground wire. So the fourth wire would have to be hooked to the metal frame of the heater to ground it. good luck.
2007-08-17 15:01:52 · answer #1 · answered by Fordman 7 · 0⤊ 0⤋