The computer with the file on it is .. Dead battery. Just now.. This one does not have storage space to speak of.
When the T-Stat calls for HEAT it talks to the mother board on the furnace, and yes it's a MOTHER often as not, also about 250 dollars to replace (OEM) or half that if you buy from Dinosaur Boards and better quality in this electroncs Trained person's opinion. More on that later.
The T-Stat talks to the control (mother) board and calls for HEAT
The board then starts the fan.. Waits a bit and when the fan is up to speed it opens the gas valve and makes with the sparks to ignight.
Since we are not getting to this point I'll stop here
You can download the wiring diagram for the unit from Atwood (I DID) and then you will find....
On the Circuit board connector there are two blue wires.. Should show 12 volt (referenced to ground) on one of 'em.. the other one is the T-Stat lead and if the T-Stat is calling for heat it too will show 12 volts.
Then you need to find the wires to the blower.. they are rather heavy. measure voltage on those wires.. Turn the SWITCH atop the blower (Oh, it is also a circuit breaker) OFF, wait 5 seconds and back on.. IF the T-stat is calling for heat you should see 12 volt on the blower leads within 1 second.. IF YOU DO and the motor is not running.. YOu have narrrowed the problem to the motor or the motor leads
If you do not. then get a new Dino Board.. DOUBLE CHECK THIS but I think it's a fan-50 for that furnace.. NOT 100% sure of that though so go to the factory web site and double check
American RV in California is where I got my Dino Board... .Back in 2012. Still working fine.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times