Help!. I am completely confused on why my portable generator will not start my furnace! When I connect the wiring I have power to the furnace but it will not start.
I have tried everything and could use some help please.
Here is what I have... a single black and white wire (from the main power supply) that connect to a black and white wire from the furnace. There is also a yellow wire that connects to the white wire from the furnace. This yellow wire goes to the combustion blower... that's it. The power line coming from my generator has a three prong wire. Not sure why there is not a ground wire going that connects any of the wires between the house current and the furnace... just the 3 furnace wires and 2 main power supply wires. Again, when I start the generator, I do have ample power
At the furnace, it just won't start. Any help would be much appreciated!
Thanks,
Frank

Where is your thermostat drawing power from?

Help!. I am completely confused on why my portable generator will not start my furnace! When I connect the wiring I have power to the furnace but it will not start.
I have tried everything and could use some help please.
Here is what I have... a single black and white wire (from the main power supply) that connect to a black and white wire from the furnace. There is also a yellow wire that connects to the white wire from the furnace. This yellow wire goes to the combustion blower... that's it. The power line coming from my generator has a three prong wire. Not sure why there is not a ground wire going that connects any of the wires between the house current and the furnace... just the 3 furnace wires and 2 main power supply wires. Again, when I start the generator, I do have ample power
At the furnace, it just won't start. Any help would be much appreciated!
Thanks,
Frank

What type of furnace do you have, gas, using the electric only to do the auto light and the blowers) or a electric furnace?

If all electric, how many watt is it, and have you considered the need for starting watts to get motor turned on.

How large is your generator?

I have a gas furnace with electric starter (no pilot light)
The generator rate 3250 watts.

Where is your thermostat drawing power from furnace with battery back-up