Why Is My Air Conditioner Not Blowing Cold Air?

AC Not Blowing Cold Air

If you find that your air conditioner is not blowing cold air, there could be a variety of reasons behind the issue. In this blog post, we’ll explore some of the common culprits and offer practical solutions to help you diagnose and potentially fix your AC problems.

Dirty Air Filters

Clogged or dirty air filters restrict airflow, which leads to reduced cooling efficiency. An HVAC system trying to operate with clogged filters is like you trying to breathe through a pinched straw.

If your air conditioner isn’t blowing cold air, your first step in problem solving is to check your filters. If they are dirty, swap them out for new ones.

Air filters should be changed regularly, ideally every 1-3 months. A timed subscription like FilterTime is a good way to ensure that your filters are changed on a regular basis.

Refrigerant (Freon) Leaks

If you air conditioner is not blowing cold air, your system could be low on freon. Refrigerant (freon) is responsible for absorbing and removing the heat from your indoor air. When levels are low, the system struggles to cool effectively.

One sign that your air conditioner is low on refrigerant is when your system fails to reach the temperature set on your thermostat. Visible frost or ice on the lines coming out of your air conditioner can be an indication that freon levels are low. Here is a list of other possible reasons why your AC is freezing up.

If you see frost or ice, shut the system off immediately and call a trusted HVAC contractor in your area. The ice will need to melt before the system can be worked on.

Thermostat Issues

It’s also possible that your air conditioning system is in great shape but your thermostat has failed in some way. Some of the older thermostats without a constant power source require batteries to operate the equipment.

A thermostat is simply a switch that automatically operates off of temperature readings. “Smart” thermostats undergo system updates and do not require batteries.

Check the settings and calibrate or restart it if necessary. If you have a battery operated thermostat, try replacing the batteries.

Dirty Outdoor Condenser Coil

Air conditioners don’t actually cool the air—they remove heat from the air. The heat from inside your home is expelled through the outdoor condensing unit.

It’s important that the condensing unit is in an open area where it can release this heat with as little resistance as possible. If the condensing unit is obstructed by debris, dirt, or vegetation, it can’t release heat effectively.

The fan pulls outside air through the condenser coil, which looks like a car radiator. If there is restriction, the fan will struggle to draw air through the coil resulting in high refrigerant pressures, low cooling performance, and possible compressor and fan failures.

If your outdoor condenser looks dirty, you can safely turn off the power and use hose water to carefully to wash it out. Or, you can call your local HVAC professional to perform a deep chemical cleaning.

Improper HVAC Maintenance

Lack of regular maintenance can lead to various issues, including dirty coils, worn-out parts, and reduced efficiency.

At Old Glory Mechanical, we recommend that preventative maintenance be performed on your home HVAC system twice per year—once before the cooling season and once before the heating season.

Preventative maintenance helps your air conditioner stay in its optimal working condition, which will lead to a longer life for the unit.

Having your HVAC contractor perform maintenance on your system before peak season gives them the opportunity to find and resolve potential issues before they cause your system to fail when you need it most.

Improper HVAC Sizing

If you notice that your AC unit consistently struggles to stay cool that may be a sign that your system is either too large or too small for your space. If your unit is too large for the designated space it will cycle on and off too quickly.

The more common issue is that builders and homeowners try to stretch and install a system that is too small. A unit that is too small for the designated space will always struggle keep the area cool—especially during peak season.

AC Electrical Problems

Your air conditioner is dependent on electricity. If your entire system is shut off it may be due to an electrical problem. Faulty wiring, tripped circuit breakers, or blown fuses can disrupt the AC’s operation and cause cooling problems.

If you suspect that an electrical problem is causing your AC issue, you should contact an HVAC contractor to help as electrical components can be extremely dangerous.

Aging Air Conditioner

Finally, it’s possible that your air conditioner simply needs to be replaced. When vital components (like a compressor) give out, it may make sense to replace your condenser altogether. This is especially true if your system is outdated (like those using R-22 refrigerant).

AC Repair in Spring Hill, TN

There are few things more frustrating than sweltering in your own home. If you’re experiencing cooling issues in Middle TN, our HVAC technicians are ready to help. We serve proudly serve Spring Hill and the surrounding cities. Give us a call today at 931-281-1211.

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