Why is there no air coming from the rear air vents in a Lexus?

[SanMila]

If there is no air coming from the rear air vents, it may be due to a faulty valve. If the air vent valve is open but no air is flowing, it is highly likely that the valve is malfunctioning. Another possibility is leakage at the connection point of the air duct in the evaporator housing. Additionally, a dirty or clogged cabin air filter can block the air vents. If the car is frequently driven in areas with poor air quality, the cabin air filter is more prone to clogging with debris. Here are some tips for maintaining your car's air conditioning system: 1. Avoid randomly adjusting the direction of the air vents: When using the air conditioning, not paying attention to the direction of the airflow can reduce its effectiveness. According to the principle that cold air sinks and warm air rises, the correct approach is to point the vents upward when cooling and downward when heating. 2. Regularly start the air conditioning in winter: In regions with milder winters, some car owners may not use the air conditioning at all during the season. Prolonged disuse can cause rubber seals to age and internal lubrication to dry out. Starting the air conditioning periodically ensures that components remain lubricated and in good condition. It is recommended to run the air conditioning at least once a week during winter. 3. Avoid prolonged use of the air conditioning: Running the air conditioning continuously after entering the car can increase pressure on the condenser and cause wear to the cooling system. Therefore, avoid using the air conditioning for extended periods. Once the cabin reaches a comfortable temperature, turn it off and restart it later if needed. 4. Ventilate before using the air conditioning in summer: During hot summer days, many drivers habitually turn on the air conditioning's recirculation mode immediately after entering the car, thinking it will cool the cabin faster. However, since the interior temperature is higher than outside, this approach is ineffective. Instead, open the windows first to ventilate and activate the fresh air mode to expel hot air. Once the cabin temperature drops, switch to recirculation mode.