You know youโ€™re going to have to stop soon for repair. But in the meantime, letโ€™s talk about what may be. These include a lack of refrigerant, debris buildup inside the unit, or an electrical.

This issue can also arise from a faulty. Webthere are several possible causes for why your semi truckโ€™s ac may be blowing hot air. Webjul 10, 2017ย ยท your semi truck ac is still blowing, but the air isnโ€™t cold.