We have a 3 year old central air/heat unit that seems to be working, but will not blow warm air. Is their a reset button? This is not a heat pump. Help its cold:eek:

If your furnace fan is working you might not be getting power to your heat elements this can be hard to diagnose by yourself if you have a volt meter you can check the points that attach to the elements to see if you have power there and we can go from there.

More info please ,didn`t say if furnace was electric or gas,, if its gas,, you won`t be finding any heat elements