Not having any heat there is aclicking sound when i turn controls to heat

You have a A/C-Heat blend door actuator malfunction. This door switches from A/C vent to heater core vents via an actuator motor.Very Typical problem on Ford/Mercury/Lincolns vehicles. There are multiple actuators in this vehicle, some in the dash and some in the rear (only if equipped w/rear A/C-Heater. This will require pin pointing the exact fault, and may require lower dashboard or rear quarter panel interior trim (if rear A/C-Heater equipped) removal