AC AIR DOOR ACTUATOR - controls the temperature of air blowing into the interior of the vehicle. This part commonly fails on popular Durango, Grand Cherokee, T680, and 579 car and truck models. It usually produces a clicking or popping sound during operation when faulty, which results in incorrect A/C or heater temperatures inside the vehicle. | COMPATIBLE WITH DODGE, JEEP, KENWORTH & PETERBILT VEHICLES - 2011, 2012, 2013 Durango | 2011 2012 2013 Grand Cherokee | 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 T680 | 2013 2014 2015 2016 2017 2018 2019 2020 2021 579 |. If the blend door actuator fails, the air conditioning and heating systems may not function properly, resulting in uncomfortable temperatures in your car. | REPLACES PART NUMBERS 604-045, 604 045, 604045, 545250008, 68079488AA, 68079488AB, T6892003 commonly found on popular Durango, Grand Cherokee, T680, 579 including year models 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 and 21. If you are unable to change the temperature of the air in your vehicle, then you may have a problem with your AC blend door actuator. | OEM FIT, QUALITY & FINISH - While this is not a genuine OEM part, it is a direct replacement and will fit and work exactly like the factory part. This replacement air temperature door actuator manufactured by AA Ignition features a redesigned housing and a rugged circuit board to ensure it lasts longer than the factory part. | LIFETIME WARRANTY - This replacement blend door actuator comes complete with a lifetime warranty. If the part ever fails on your vehicle, simply contact us for a free replacement. Save time and money by purchasing this actuator and replacing the part yourself.