I have a 1998 Fleetwood Bounder with an ECC (Electronic Climate Control) system. For some reason my Atwood Furnace quite working. I called Intellitec (the manugacurer of the ECC) and they told me how to check out the thermisters, which checked out fine. The control module clicks when I have heat selected and I move the temp lever above the current temp. indicating that the control module is operating. I can not find any fuse for the furnace either in the fuse box above the refrigerator or engin compartment. The switch in the furnace comapatment is on, however I do not know if it is suppose to have power to it all of the time or just when the furnace is suppose to come on.
When I say it is not working I mean no fan no indication at all that it even wants to start.
Thanks for any help
As it happens I have an attwood furnace. And it HAD (I stress the past tense) issues.
What is the model? That will help me to advise you but here is some info.
When your climat control calls for heat, the control board IN THE FURNACE turns on the blower, Once the blower is up to speed, a sail switch (blowing in the wind of the blower) closes, at this point the furnace board sends power to the gas solenoid and begins making sparks.
After a fixed interval it shuts down the sparker and looks to see if it's hot.
If it's hot, good, if it's not try again, After 3 tries give up.
When the climat control says "Warm enough" the furnace control shuts down the burner,, but lets the blower run a bit. (Cool down cycle).
There may be a glass cartridge fuse (3ag like) on the furnace control board.
The switch, is also a circuit breaker
And it is full time HOT, (Has 12 volt to it all the time)
(Just checked the service manual.pdf don't you know)
I am not sure of the download page for that manual.
12 volt from the other side of the switch is fed to the Thermostat and 12 volt from the switched side of that to the Sail switch.
You can check for most of those voltages at the multi-pin connector on the furnace control board
In addition to that connector the furnace board has 3 or 4 more
Fan (power to the fan) 12volt (Power from the switch), Ignition/flame sense This is both the high voltage ignition lead and the flame sensorlead.
Some those last two are separate leads.
On mine by the way the symptom was that it lit but only ran for a few seconds, they it tried again, and again, and shut down.. Bad control board in the furnace, A new Dinosaur board and it's 100%.
Nothin adds excitment like something that is none of your business
Kenwood TS-2000 housed in a 2005 Damon Intruder 377
Actually, a furnace from 1998 will have the fan controlled by a time delay relay that is turned on by thermostat / contact closure.
Fan comes up to speed, sail switch closes, board gets power through sail switch, starts ignition cycle. 3 attempts, board shuts down. But, fan continues to run because time delay relay is still energized by thermostat or contact closure.
I am betting the TDR isn't getting power, or is defective.
The TDR is also responsible for the furnace to keep its fan running long after the propane bottles have run empty or the changeover regulator didn't switch bottles.
Newer furnaces have fan control on the circuit board itself. Hate that arrangement, but at least fan doesn't run needlessly.
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