Originally Posted by tennlady
Have a question concerning our furnace. We were camping and it got down to 40 so turned furnace on and it ran fine with hot air coming from furnace vents, but the air conditioner in the ceiling was also running with air going in (cold air return maybe) but also cool to warm air coming out. Is that normal.
Common occurrence with the digital thermostat. Switch the setting to Fan, switch the fan to Auto, then turn the furnace back on. Shouldn't have an issue with the AC anymore.
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