Why is My Air Conditioner Not Cooling?

Your AC unit has served you well for years, ensuring a cool interior throughout the hottest days of summer.  However, you may have noticed recently that it simply isn’t pumping out the chilly air you expect.  What gives?  Why isn’t your air conditioner providing the cool air you need to remain comfortable during warm weather?

As it turns out, there could be all kinds of reasons why your AC unit isn’t doing the job it once did.  You needn’t automatically jump to the conclusion that it’s broken and you’re facing thousands of dollars in upgrades, either.  It could be something as simple as changing a setting on your thermostat.  Here are just a few potential causes of subpar AC performance.

Faulty Settings

If the air coming out of your vents isn’t cool, or worse, it’s warm, the first thing you should check is the setting on your thermostat.  Generally speaking, you should set your system to auto so that when sensors note an interior temperature above your desired setting, the AC unit will kick on to compensate, turning off when your home has reached the desired temperature.

However, if you’ve accidentally set your thermostat to “on” instead of “auto”, it will just keep running, day and night, regardless of whether or not your home is sufficiently cooled.  When the set temperature is achieved, the system will simply stop blowing cool air, and potentially revert to warm air for a time.  See if changing the settings does the trick before you try anything else.

Unclean Machinery

Dirt, dust, dander, and other particulate buildup can be detrimental to the proper function of your HVAC equipment.  This is why regularly scheduled HVAC servicing is so important.  When a qualified HVAC technician comes out to inspect, clean, maintain, and repair your system regularly, you can avoid the dirty filters and equipment that cause your system to malfunction.

Lack of Refrigerant

Low refrigerant could mean a leak, or it could just be natural depletion.  You won’t know until your HVAC technician checks, but this is a fairly common cause of AC that simply isn’t cooling your home.  Priming the refrigerant could solve the problem, but you might also have to upgrade equipment if a leak is found.

Frozen Coil

When your system is dirty and clogged with gunk, your AC unit can suffer a frozen evaporator coil that minimizes the cold air getting into your home.  A good cleaning and ice removal should help to alleviate this particular problem, and regular cleaning should prevent further issues.

Contact Service First for all your AC Needs!