Unplug the refrigerator from the wall outlet or turn off the breaker in your home's service panel.
Remove the screws securing the damper housing cover to the top of the left wall of the fresh food compartment.
Disconnect the wire connector from the rear of the damper assembly.
Pull the thermistor out from behind the plastic strip in the rear corner of the compartment or from the wall, depending on the model of your refrigerator. The thermistor is identified as a skinny plastic tube approximately 2 to 4 inches long and may be black or white.
Pull the old air damper assembly away from the wall to remove it. The assembly is secured using an adhesive strip, so it may take some effort to remove it. Remove any remaining adhesive from the wall.
Peel one of the sides off of the new adhesive strip included with the new damper assembly and affix it to the damper.
Peel the other side off of the adhesive strip and install the damper in the fresh food compartment.
Reinstall the thermistor and then connect the new damper's wire connector to the refrigerator wire harness.
Reinstall the damper assembly cover, using the screws that were removed to secure it in place.
Plug the refrigerator back into the wall outlet, or turn on the breaker in your home's service panel.