Best Tire Shops in Chantilly, VA

Why is my car AC blowing warm air? The most common reason your car AC may be blowing warm air is because of low refrigerant levels in the air conditioning system. These low levels can be caused by leaks in the AC system or natural loss overtime through the many lines and connections. Generally, this natural loss of refrigerant with no significant sources of a leak may take anywhere from 3-7 years. Actual leaks in the system however, could cause your car to blow warm air within hours of recharging it depending on the severity. Common parts that fail overtime and start to leak are AC condensers, AC lines and Evaporator cores. Restrictions in any one of these can affect the flow of refrigerant along with creating excess pressure which in turn can prematurely wear out other parts. Lastly, the failure of key components such as the AC compressor can cause your car to blow warm air even if the system has the correct amount of refrigerant in it. Due to federal mandates a different more environmentally friendly refrigerant is required in newer cars. This is called 1234yf refrigerant versus the older 134a refrigerant. There are many factors to consider in diagnosing a vehicles AC system. Here at Main Street Tire and Auto our certified master technicians are more than capable of handling all of your car care needs, and all automotive repairs come with a 3 year/36,000 mile nationwide warranty.