Why Isn't My Car AC Blowing Cold Air? Common Causes

Few things are as miserable on the hot Missouri summer as climbing into the car and turning on the AC, only to be greeted by the familiar and unpleasant warmth of your own air. If your air conditioner fails you on particularly hot St. Peters day, it not only causes comfort issues, but safety problems for your senior, children, or pets. The good news is that most air conditioning problems have easily identifiable causes, and are generally easy to fix. HI-TECH Automotive offers a professional air conditioner service in Saint Peters, MO and our professional technicians have dealt with and resolved every AC issue known to man. Here are the probable causes of your troubles:

Low Refrigerant

By far the most common culprit for a cold car AC failure is simply low refrigerant. This is the substance that the AC system uses to absorb and transfer the heat out of your car. It is not consumed by the process, meaning that the likely cause of low refrigerant is always due to a leak. A refrigerant recharge may be all you need to restore your AC, until such time that you bring your car to HI-TECH Automotive, where we will locate and repair the source of the leak, then test and recharge the system again.

Refrigerant Leak

A refrigerant leak can occur anywhere in the system, often without notice. Your AC may have been working intermittently, and your system may have lost refrigerant slowly, over time. At HI-TECH Automotive, we will locate the source of the leak using UV dye and specialized leak detection equipment. We will proceed to mend the site of the leak, and ensure that your system holds pressure before moving forward.

Compressor Failure

The compressor is the heart of your AC, it adds pressure to the refrigerant and is responsible for the entire cooling process. If it begins to fail, your system will often put out cold air intermittently, or simply warm air. You may hear a clicking sound while your AC is attempting to kick on, or a grinding, or rattling noise if it does. Compressor replacement is an expensive proposition, and is one of the more involved AC repairs, but it is worth noting that a faulty compressor can cause further system failures if left unchecked.

Clogged or Damaged Condenser

Your condenser is located at the front of your vehicle, mounted near the radiator. It is here that the heat from your refrigerant is expelled from the system into the atmosphere. This makes it particularly susceptible to bugs, dirt build-up, and other foreign objects, especially during Missouri summers. A damaged condenser can suffer bent fins or minor punctures, which will both impede its ability to expel heat from the system. As a routine part of our AC inspection, we check and clean your condenser if necessary.

Failing Blower Motor or Fan

While the blower motor and fan are generally reliable, they can intermittently fail, or suffer gradual degradation of function. A failing blower motor can drastically reduce your AC output, to the point that it may feel like your system has quit working altogether. Same goes for the condenser fan, which can cause your AC to work poorly at lower speeds. For reliable air conditioner service saint peters, our team can inspect these components and identify the cause of reduced AC performance.

Electrical Issues

The car AC systems of today are controlled by a complex network of sensors and relays. If one of these electrical components fails, it can render your AC completely non-functional. The cause of an electrical AC failure can range from a single blown fuse to a faulty control module. An electrical AC problem should be diagnosed by a professional, and with a professional AC diagnosis from HI-TECH Automotive, you'll be on the road to a cool Missouri summer.

Clogged Cabin Air Filter

The cabin air filter is one of the most under appreciated automotive features available. It can also be a major cause of AC issues, if not replaced as recommended by the manufacturer. At best, a clogged cabin air filter will severely limit your AC output. At worst, it can cause your system to fail entirely. Cabin air filters are generally due for replacement every 15,000-25,000 miles, depending on your vehicle.

If your car AC is not putting out cold air, you should avoid risking discomfort and safety by waiting this out in the hot Missouri summer. The cause of your cold car AC failure is almost certainly not going to fix itself, and should be looked at by a professional. Whether it's an easy refrigerant recharge or a more involved system repair, HI-TECH Automotive is here to deliver a swift and thorough air conditioner service in Saint Peters, MO. Simply bring your car in and let our Saint Peters team quickly identify and solve your AC problem, returning you to the comfort of a cool Missouri summer as soon as possible.