OK, here's what I just observed. With no shore power. I turn on the heat system to the fan position with the thermostat set around 50 and the furnace fan runs for about a minute. After it shuts off I can't get it to come back on by flipping any combination of switch ac/heat fan auto settings. However, if I run the temp setting up to 90 the furnace fan comes on, I then run the temp setting back to 50 and the furnace fan continues to run for about a minute and things start over.
Hope that helps. If not then let me know and I'll try something else.
