Why my heater & AC control lights flash? on 1998 Dodge Grand Caravan

They blink all the time. When I crank the car, the control lights come on all the time and never go off until I turn off the ignition. What should I do to get them to stop flashing?

Asked by for the 1998 Dodge Grand Caravan
Im not sure but mine started blinking like that after about a month my ecm went out