How to Solve the Problem of Frozen Car Evaporator and No Airflow?
1 Answers
The reasons for the car evaporator freezing are as follows: 1. Reason one: The expansion valve's adjustment is too small, resulting in excessively low low-pressure. 2. Reason two: Insufficient refrigerant in the system, causing the evaporation pressure to be too low. 3. Reason three: The internal circulation filter is clogged. 4. Reason four: The temperature control or temperature sensor is malfunctioning, and the compressor does not shut off. 5. Reason five: The energy control valve or pressure regulating valve of the variable displacement compressor fails, causing the compressor to operate at full capacity continuously, leading to excessively low low-pressure and evaporator frosting. Solutions for the frozen evaporator are as follows: 1. Check the temperature control sensing bulb: Ensure it is in the correct position. 2. Check the temperature control adjustment: Adjust it slightly smaller if possible; if not adjustable, replace the temperature control. 3. Check the air conditioning computer control: Determine if there is a fault. 4. Check the evaporator for freezing: Besides the compressor not shutting off, also inspect if the evaporator fan's inlet and outlet dampers are blocked. 5. Check the fan speed setting: If it is set too low, increase it to enhance the circulation of heat, which will naturally improve performance in hot weather. 6. Check the temperature damper system control: It is operated by a servo motor. If the damper system malfunctions and air cannot circulate, the evaporator will freeze.
