my heater won't work, I only get cold air on 2005 Mercury Mountaineer

my heater doesn't work , I only get cold air all the time.
when i switch to hot air all I get is this clik, clik, clik
behind the air controls

Asked by for the 2005 Mercury Mountaineer
1 answer
The clicking noise you are hearing is the blend door actuator trying to open the door. Most likely the motor will need replacement.