Thanks for your reply. My fan does not start, then stop. It just does nothing when I turn up the thermostat. The instructions say to turn up the thermostat to start the fan, and run for about 5 minutes prior to lighting the pilot. This process worked until a couple of weeks ago. I now turn up the thermostat, and nothing happens. I do not hear the fan from the heater kick on.
Here is what I was thinking, but do not want to mess up my system. I was thinking if I disconnected the two wires that go to the thermostat, then connected them directly together, that should complete the circuit and the fan should start. I believe this would indicate that my thermostat was bad. Is my logic flawed???