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Two furnaces, at same time, both lost heat but still blow cool air
Two furnaces. One in crawl space, one in attic. Downstairs is set on a scheduled. Upstairs is turned off as there is
enough heat from the lower level system and sleeping in on lower level.
Yesterday, after returning from a day out, we noticed the temperature falling in the house as the day came to a close. Normally the heat would be running and it would be toasty. We manually bumped up the thermostat to force the heat to come on. It did, but only blew cold air. We then turned on the upstairs thermostat and noticed the same result. No heat, just cold air.
Today my father and I looked at the crawl space unit, downstairs system, and didn't see anything obvious, nor anything that could make sense to affect both units the same way at the same time. We checked the gas. It was not having a problem heating the hot water heater. We did some tests and smelled gas as expected when trying to force the furnace to fire. There was a code 14 set by reading the blinking red light.
Both systems are Carrier 58PAV/RAV. We turned off the breaker/power for more than 5 minutes (in fact we tried for 3+ hours) turned back on and still no heat.