"does the thermostat have both ac and heat settings on it? does it have fan settings of both automatic and on?"

Nope, just a hi to low range. Another device for the (former) swamp coolers, which I have *just now" set to "OFF", but I don't see how they woulf be connected????

My question is about a Coleman Furnace, but not about service/repair, so I _think_ this is the appropriate place for it. OK, I'm between Las Cruces, NM and El Paso, TX, and it is HOT! At 5:57 PM on May 26, the temperature _in_ the house (28x60, 3 BR, 2 Bath) is 92! I took the 2 swamp coolers off and...