Draft Fan

When you say "push the button," I assume you have the IQ4. If the fan isn't running at all, I don't see how you're able to get the fire going and raise the temp enough to cook on it.

Ok, I solved my problem. Putting a meter on the power supply showed 12 volts but the solid state relay was only putting out 4 volts. Must be a heavy load on the fan circuit. Then I noticed the fan getting hot and smelly. Sure enough the fan was shot. I drove down to my local Radio Shack and picked up replacement for $20.00 (273-0238). Good thing to know on the road. Putting it back together I noticed the auger kept stopping when I touched the wires. I found why my unit kept shutting down in the middle of a cook. Who ever put the motor connector together didn't push one pin in all the way and the connection was not stable.
All seems well now and I hope this stops my flame out, flame up and bon fire problems. I will get a factory replacement fan and keep this Radio Shack fan as an emergency part.