AC Not cooling house troubleshooting guide

Why is My Air Conditioner Not Cooling my Home?

The most common reasons your air conditioning system is not cooling:

  1. Clogged, dirty, or incorrect type of filter.
  2. Thermostat is not adjusted properly.
  3. Air flow to the condenser is restricted or blocked.
  4. Low refrigerant/coolant.
  5. Ductwork connection has dislocated.
  6. Fuse or electrical connection has malfunctioned.
  7. Dirt accumulation at the condenser.
  8. Undersized HVAC system.
  9. Thermostat is broken.
  10. Compressor is failing.

AC Not Cooling House Troubleshooting Guide

When your air conditioning system isn’t cooling, pinpointing the cause is a process of elimination.

Let’s start at your thermostat…

Check the settings on your thermostat. Does your thermostat have power? Is is set to cool? If there is no power to the thermostat, your AC will not work.  Ensure the setting is set to “cool” and not “heat.”

Then, head over to your filter…

Your HVAC Filter should be changed every 3 months

If your filter is clogged it will restrict airflow.  If the incorrect filter is placed, it can also restrict or block airflow.  Do you have a HEPA filter?  Some older HVAC systems struggle to pull enough air through a HEPA filter. If you have an older HVAC system and you have a thick HEPA filter, try changing the filter to a filter with a lower MERV rating.  Changing your filter is simple. Your HVAC filter should be changed every three months.

Inspect Your Condenser (located outside, square shaped component)

Your condenser should be free from dirt.  Additionally, the area around your condenser should be clear and clean.  If you have shrubs growing around the unit, it could be restricting air flow.

If there is dirt and debris buildup around your condenser, you can simply clean it with a hose.  Use a low pressure stream of water to wash off your condenser.

The area around your condenser should be clean and free of shrubs

Many residential properties will have what’s called – a packaged HVAC system.  This is where your system is located on the roof.  If your AC is located on the roof, you will not have a condenser located in your yard.

If Your Air Conditioning System is Still Not Cooling, It’s possible one of these issues exist.

  1. Your AC system is low on refrigerant.
  2. A section of your ductwork connection dislocated.
  3. A fuse or an electrical connection has malfunctioned.
  4. If your HVAC is new, you may have an undersized HVAC system.
  5. Your compressor could be failing.

If one of these above issues exist, it’s best to call a licensed, qualified AC repair company to come onsite and diagnose your problem.

Why Do People Choose Corman & Sons to Fix their AC When It’s Not Cooling?

“Working with us you will save money, receive prompt, professional service, and have your property looked after.”

Mindy Rodriguez | Corman & Sons Owner

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