Induced draft motor stays on.
All right, here's the deal. I've had intermittent problems with this furnace for the last two weeks. At first it didn't want to come on after being off for a while, like when the thermostat kicked down for the evening. If I can=me down, turned off the power switch for 30 seconds or more, it would start up and run fine again for a day or so.
Finally, that didn't work. It would try to start, but then shut down. HVAC company came out and said there was no power going to the gas valve, the control board must be bad. They replaced that and still no heat.
Different tech comes out and finds that the pilot sensor was loose, tells the guy to take the new control board back off (saving me $400!) and fix the sensor.
Great,now I have heat. Except that the draft fan wants to stay on all the time now. If I turn off the power for that 30 seconds or more, it will stay off for a while.