A/C Recirculation button should be ON or OFF ?

Road fumes and ac recirculation mode

Recirculation air door actuator open or closed?re-circulation mode button

Driver fatigue is a main concern in the battle to decrease road accidents and fatalities.Other than lack of sleep, driver fatigue could be caused by car’s in-cabin too high temperatures and exhaust pollutants such as carbon monoxide, hydrocarbon and nitrogen dioxide inducing poor coordination and reaction time while driving, that may increase the likelihood of a collision.

Automotive In-cabin air quality & outside air quality.

Carbon monoxide gas is produced during incomplete combustion of fossil fuels.Concentration of 9 PPM is suspected to produce adverse health effects,according to EPA.In an attempt to avoid unpleasant smells from chemical substances into the auto-cabin from the driving environment the car’s air conditioning system, driving urban areas is mostly set to recirculation mode; by doing this most of the fumes from other vehicles sharing the road are trapped by in cabin air filters and purified by the ac evaporator core and this air is recirculated inside the cabin over and over again. When set to this mode for long driving periods of time, high concentration of carbon dioxide are created due to crew’s own exhalation, decreasing the quality of the air inside the cabin.

Vehicle’s air quality monitoring & sensors.

An air quality sensor plays a vital role maintaining and acceptable air quality level. The air quality sensor will detect undesired gasses and odors such as: carbon monoxide ,nitrogen dioxide or carbon dioxide outside as well inside the car, automatically triggering actuators in the hvac case to adjust the flow of air in and out of the cabin, keeping an optimal recirculation valve operation.

Manual control.

Manually controlling this setting in your vehicle, the best option would be to take fresh air into the cabin, specially during long driving periods from time to time along the road.

AC Repair in Miami,mobile service.

Auto A/C Repair LLC specializes in automotive air conditioning systems.If any of the ac actuators or plenum doors in your car’s system are not working properly it will negatively impact the performance of your ac system.We are always the nearest shop in town,helping you save time and money.Call now for a free estimate and free on-site check up of your car’s air conditioning.