If the A/C system in your 6th generation (2019, 2020, 2021, 2022, 2023 & 2024) Nissan Altima sedan hasn’t been working well recently, you probably need to clean or change the cabin air filter element in the HVAC blower motor housing. Check out the DIY tutorial for the procedure (with the part numbers) by clicking on the text link or thumbnail image below.
2019-2024 Nissan Altima A/C Cabin Air Filter Replacement Guide