Heater Problems

[twilight10]

I have a 1977 Tradewind 25' with a problem heater. I have the propane on. I have electricity to the heater. When I throw the thermostat on, the blower just blows cold air. The heater is not igniting. I have opened the heater and I can see two wires going into the heater to two insulators. There is a third (ground?) wire attached only to the metal shell of the heater, where does this go? why wont it ignite?
Thanks

[Ganglin]

How long did you let it run? The first time we fired ours up to test it it took at least 3 or more minutes before it fired up....

[twilight10]

Yeah, I let it run 15 minutes. No Go

[purman]

There is a switch that lets it now when the fan is running sometimes it goes bad and it won't let the propane through to light. Can you here the igniter going click click click?

[Mike Leary]

What brand of furnace is it? If it's a Suburban, I know WAY more about them than I should!

[wasagachris]

Twilight10 if this is the original furnace then it is a pilot light model. You must first light the pilot light manually. Once the pilot light is light and you turn up the thermostat the fan will run and the burner will ignite. There may also be a shut off valve adjacent to the furnace on the copper propane line. Make sure it is open.
Can you post pictures and the model number of the furnace. This will help us determine which type of furnace it is. Can you see a circuit board attached to the furnace or a multi wire harness going into the furnace case?

[twilight10]

Ok it is a Surburban model T-7 I just hooked the AS up to 110V AC, threw the switch, and she, the heater, lit up like a dream. I'm now thinking it's the battery. I disconnected the 110V AC and tried it- no go The Battery was down to 45%. Now recharging the batteries.

[twilight10]

Ok , so it now starts with a fully charged battery. I think the problem is solved.
I need a pretty full battery in order to ingite the furnace. or so it seems...
Thanks