2019 Model 3 AC not cooling well, cabin air filter replacement?

ClearTheCode guidance (Tesla · Maintenance & DIY)

Summary: For 2019 Model 3 AC not cooling well, cabin air filter replacement?, work through these steps on your 2016+ vehicle:

1. Confirm the symptom — note when it happens (cold start, highway, after fuel fill, etc.).
2. Scan codes — save all pending/stored DTCs; don't clear until you've recorded them.
3. Check TSBs & recalls — look up your VIN for open campaigns and known fixes.
4. Inspect the obvious — related fuses, connectors, fluid level, and recent repairs.
5. Test the common fix — follow model-specific service procedures; one change at a time.
6. Escalate if needed — burning smell, no brakes, overheating, or stalling in traffic → shop visit.

Owner reported: Hey everyone,

My 2019 Tesla Model 3 Long Range isn't cooling as effectively as it used to. The air coming out isn't super cold, especially on hot days here in Arizona. It feels like the AC is struggling to keep up.

I'm wondering if it's time to replace the cabin air filters, or if there's something else I should check before taking it to service. I've heard these can get pretty clogged. Any DIY …

This is educational guidance, not a substitute for hands-on diagnosis.