I’ve noticed my heater isn’t working. It’s not having issues blowing air, but it’s only cold. I’m not very knowledgeable with vehicles, so I’m lost lol. For reference, I drive a 2017 Nissan Altima 2.5s.
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It’s likely the air mix motor. That’s the part that adjusts how much cold air is coming from the ac system and how much hot air from the engine bay. It seems like it’s stuck on full cold
heater core, thermostat, physical ac control buttons problem, could be a few. have it checked in a shop