Central air fan won't shut off

Our central air and heating system is not shutting off and it is blowing cool air. Does anyone know what causes this and how to stop it? Should we change the air filter? We have already changed the batteries in the thermostat.

We have central air, and recently it wasn't blowing cool air like it used to. We then noticed that the fan outside wasn't working even when the central air was turned on. Does anyone know what I should do before calling someone?

Our central air conditioner would not start. Since we had this covered under our utility provider's WorryFree Services program, they sent a technician to look into the problem. The technician had to replace something like a transformer which had died due to old age. The airconditioner runs now...

The fan on my central air unit doesn't run. The condencer kicks on and the blower on the furnace works. Why doesn;t the fan work.

Hello, I have central heat and air installed in my house. Recently, when the air conditioner shuts off automatically, the fan continues to blow. I've tried turning the air off heat switch to off and the fan switch to auto, but it still runs. I'm not sure what to do and I am concerned that at the...