![]() Check your vehicle’s owners manual or look under the hood to find the type of the refrigerant your vehicle uses. The pressure values based on ambient temperatures differ depending on the type of the refrigerant. Most modern vehicles use R-134a refrigerant, but newer vehicles are increasingly using R-1234yf as a more environmentally friendly replacement. So, even if you recharged your Cobalt AC at the recommended pressure, the system could still over pressurize when the ambient temperatures get warmer. The refrigerant pressure is affected by the outside atmospheric temperature. Ambient temperature affect on refrigerant pressure An overcharged system not only affects cooling performance but can also damage the compressor and sometimes can cause a major leak. Just like with low refrigerant, the AC in Cobalt will blow warm air only if the AC system is overcharged with refrigerant. Note: See next section for recommended pressure values. Shake the canister briefly and release the refrigerant into the system until the recommended pressure has been achieved.The recharge kit will only properly connect to the low pressure port, and will not fit the high pressure port. Note: If the ports are not labelled, try connecting the recharge kit to both unlabeled ports on the AC hoses. Remove the cap from the low pressure service port labelled L, and connect the AC recharge kit.Turn on the AC and set it to the coldest setting, and the fan speed to maximum.This information is typically located under the hood and/or in the owners manual. Check which type of refrigerant your vehicle uses.You can recharge your AC through the low-pressure port with a do it yourself AC recharge kit. One is labelled H for high-pressure and the other one is labelled L for low-pressure. There are two ports in the air conditioning system of Cobalt. How to recharge AC refrigerant in Chevy Cobalt When the refrigerant leaks again, the leaking component will shine under UV light. ![]() The leak can be diagnosed by injecting small amount of fluorescent dye into the AC system. Refrigerant leak in Cobalt can be caused by leaking O-ring seals, leaking condenser or evaporator core, or a cracked hose. If the refrigerant level goes down again quickly, it means there is probably a leak. Just have it refilled and you can drive with pleasant temperatures again. ![]() If you don’t service the AC system in your Cobalt for a long time, the refrigerant level will eventually get so low that the system loses its cooling capacity. Ideally, the refrigerant should never leak in a properly sealed AC system, but most car AC systems do leak small amount of refrigerant over time due to minor imperfections and will need recharging after every few years. Refrigerant leakĪ low refrigerant level in your Cobalt does not necessarily mean there is a leak. This can happen due to a leak or if the AC has not been recharged for a long time. ![]() If your Cobalt smells bad when you turn on the heater or air conditioner, or it seems like the fan doesn't blow air as well as it used to, replacing your cabin air filter is a likely the best fix! The video above shows you where the cabin air filter in your 2010 Cobalt is located and how to check it.Insufficient amount of refrigerant in the AC system is one of the leading causes of AC not blowing cold air in Cobalt. Not all Chevrolets have a cabin air filter and for some models, the inclusion of a cabin air filter depends on what trim level you have (LT). These filters are fairly inexpensive, so check out our parts page for great deals on a new one (tip: buy several, when you go to check the cabin air filter on your Cobalt, you can easily swap it for a new one if it is dirty). In addition to improving the air quality of your Cobalt, replacing your cabin air filter will put less strain on your heating and air conditioning system and can increase your gas mileage. You need to change it at least once a year or every 20,000 miles, whichever comes first. The cabin air filter (also known as the pollen filter, AC filter, dust filter, hvac filter and hepa filter) in your 2010 Chevrolet Cobalt cleans the air that you and your passengers breath inside of your car.
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