pop-up camper heater problems

[Bronson2]

I tried lighting my furnace to no avail, so I changed the thermocouple and tried again. The pilot light would stay lit as long as I held the button in, I held the button for several minutes. I have anew regulator but haven't changed it yet. Any ideas or suggestions would be appreciated.

[ZapMan]

Is it a forced air furnace? If so make sure the battery is hooked up right, the fan may turn, but it's going backward and it wont let the fire lite. I made this mistake once.

[zamboni]

My fan has to be running for the heater to light in my pop-up