HVAC won’t shut off

[mrasg1]

It's 88 degrees in nj today. Turned my ac on with room temp at 78 and set temp at 72. 72 now but won't shut off yet..it eventually shuts off. And if I put temp at 73 it'll shut off. How can I tell if it's bad capacitor or bad thermostat sensor for example?
freon is good.Air cold out of vents

Thanks!

[Admin]

Is it the outdoor unit that keeps running or the fan inside?

What type of thermostat do you have and is it on a scheduled program?  It may be some type of adaptive technology that overshoots the setpoint.

[samihabib]

Or you have bad batteries in the thermostat that need to be replaced