Could be a number of things from a vacuum leak to a dirty condenser coil dirty evaporator core cooling fan not pulling enough air through the coils we'll make it Blow warm could be low low on freon just a number of things
1. AC problem. Could be that the refrigerant is low and needs to be recharged. Or it could be a defect in the compressor, or the high or low pressure switch, the clutch relay, or activation switch, or something else. 2. Might be the blend (mode) door in the dashboard. It might be sticking on "hot" because of a defective actuator.
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