Hi, we have our air conditioning on, when we turn off the air conditioning our furance continues to run.
Carol

Check your termostat to see it is in on position? It should be in auto

Thank you, we did check that it is on auto. I appreciate your time

Probably the fan relay is stuck on. Sometimes you can tap it with screwdriver handle and unstick it. Best bet is to test it and replace if bad. Bad news is if it is built into the circuit board (if you have one) you will have to replace the board. Expensive