California’s Inland Empire is known for its extremely hot temperatures, and that’s why having a reliable air conditioner is so important here, as well as in the central and southern parts of the state. Unfortunately, you may end up wondering, why is my AC not blowing cold air? If this has ever happened to you, it’s important to understand why your AC might not be blowing cold air, how to troubleshoot the problem, and when to call the pros. If you need help with your air conditioner, the experts at PDS Plumbing and Air are here to assist you with all of your home cooling needs.
Common Reasons Your AC Isn’t Blowing Cold Air
While every situation is different, there are some common reasons why your air conditioner is not blowing cold air.
Clogged air filter
One of the most common (and easily fixable) reasons your AC may not be blowing cold air is a dirty or clogged air filter. When the filter is clogged, it impacts airflow and makes it more difficult for the cooled air to pass through the system. This routine maintenance issue may also affect the evaporator coil and cause it to freeze, impacting the air conditioner’s performance and cooling ability.
Refrigerant leak
Modern air conditioning systems need refrigerant to cool the air in your home. If you have a refrigerant leak, the levels become low, leading to insufficient cooling or, even worse, warm air blowing from your vents. If you suspect a refrigerant leak, we recommend contacting our team so a trained HVAC technician can assess and correct the problem safely.
Dirty condenser coils
The condenser coils are located outside and are designed to help release heat from the AC system. When they get dirty, they cannot properly release heat, which may cause warm air to blow from the vents. Fortunately, this issue is usually an easy fix and only requires a thorough cleaning of the coils to support proper airflow and the release of heat.
Thermostat issues
An incorrect thermostat setting may prevent your AC from producing cold air. It could also be due to a low or dead battery, or your thermostat may be malfunctioning altogether. Make sure the thermostat is set to “cool” and that it has fresh batteries, then confirm that it’s set to a lower temperature than the current temperature inside your home.
Is It a Thermostat or Electrical Problem?
An AC not blowing cold air could be due to either a thermostat or an electrical problem. Here’s how to tell which issue may be affecting you.
Thermostat problems
Check for these issues to determine whether you have a thermostat problem:
- If your thermostat display is on, but the AC is not responding after you adjust the temperature, it could be due to a malfunctioning thermostat.
- When your AC turns on and off rapidly, it’s called short-cycling, and a faulty thermostat may cause this.
- Check your thermostat reading to confirm it matches the actual room temperature. If it doesn’t, it’s likely because your thermostat needs new batteries or is simply malfunctioning.
- Sudden temperature fluctuations without anyone changing the settings may be a sign of a faulty thermostat.
Electrical problems
Some AC issues are electrical-related, and these are some signs that you’re dealing with an electrical problem:
- If your thermostat is on and set correctly, but your AC still doesn’t turn on, there’s a good chance it’s due to an electrical problem.
- When the AC circuit breaker keeps tripping, it may be due to an overloaded circuit or a faulty circuit breaker.
- Some odd noises, such as a loud humming sound coming from the AC unit, could be a sign of a potentially dangerous electrical issue.
When It’s a Refrigerant or Compressor Issue
If you have a refrigerant or compressor issue, it is best to leave it to an experienced HVAC professional. Look for these signs that may indicate a problem.
Refrigerant issues
These signs likely mean that you have low refrigerant, a refrigerant leak, or both.
- An AC blowing warm air is one of the most common signs of a refrigerant leak.
- Weak or reduced airflow from your vents may also indicate low refrigerant levels or a leak.
- Ice buildup on your evaporator coil or refrigerant line is another sign of a refrigerant leak.
- Refrigerant leaks often cause unusual hissing noises coming from the unit.
- Water dripping from or pooling around your HVAC unit could be a sign of a refrigerant leak, moisture issues, or another type of leak.
- Energy bills that are higher than normal may be due to a refrigerant leak, since it forces your system to work harder and use more energy to operate.
- Low refrigerant may cause your AC to take longer to cool your home.
Compressor issues
The following are some common signs that you may have an issue with your compressor:
- Grinding, rattling, or screeching noises can often be a sign of a failing compressor.
- When your AC starts short-cycling, it may be another sign that the compressor is broken or malfunctioning.
- Unusual vibration, especially when you first turn your AC on, is another warning sign of a possible compressor issue.
- A failed compressor could trip your circuit breaker, most notably when the air conditioner is trying to turn on.
- Inconsistent AC performance may also be related to a malfunctioning compressor.
DIY Troubleshooting Steps Before Calling a Technician
If your house AC is not blowing cold air, start by turning the unit off and then try these DIY troubleshooting steps before calling PDS:
- Step one: Check your thermostat and make sure it’s on and set to “cool.”
- Step two: Inspect the air filter and replace it if it’s dirty or clogged.
- Step three: Examine the outdoor condenser and make sure it’s clean and debris-free.
- Step four: Locate your home’s electrical panel and confirm that the AC breaker is not tripped.
- Step five: Look at the evaporator coils and if they’re frozen, turn off your AC and allow them to defrost.
- Step six: Make sure all of the vents inside your home are free and clear of any obstructions.
When to Call a Professional HVAC Technician for AC Not Blowing Cold Air
If you’ve tried the steps above and your AC still isn’t blowing cold air, it’s time to call the professional HVAC technicians at PDS Plumbing and Air. Contact us if you notice:
- Loud noises that persist or worsen
- Ongoing short cycling or an AC unit that won’t turn on
- Signs of a refrigerant leak
- A circuit breaker that keeps tripping or other electrical issues
- Possible leaking or blocked ductwork
Contact PDS Today!
Don’t let your air conditioner leave you to suffer in the Southern and Central California heat. The experts at PDS Plumbing and Air are available to help diagnose and repair all of your air conditioner-related concerns. If you’re ready to schedule service, contact us today!
