If your car AC is not blowing cold air, the most common cause is low refrigerant, which almost always means there’s a leak. Other common causes include a failing AC compressor or clutch, a blown fuse or relay, a blocked condenser or failed condenser fan, a stuck blend door, or an electrical fault. Some causes … Read more
If your car heater is blowing cold air, the most common cause is low coolant. Your heater works by passing hot engine coolant through a small radiator called the heater core, so without enough coolant, there’s no heat. Other common causes include air trapped in the cooling system, a thermostat stuck open, a clogged heater … Read more
If your car’s AC is blowing hot air on the driver side but cold air on the passenger side, the most common cause is a faulty blend door actuator. In cars with dual-zone climate control, each side has its own small motor that controls the temperature. When the driver-side one fails, that side can get … Read more