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Common AC Problems: AC Running Constantly

If your air conditioning unit constantly runs without shutting off, or cycles on and off continuously, several issues could be causing it.

Here are the 10 most common reasons your home’s air conditioning unit might not turn on and off properly.

  1. The evaporator coil is dirty and impeding the cooling process.
  2. A frozen evaporator coil also causes the unit to continuously blow warm air and can damage the equipment.
  3. A clogged air filter restricts airflow. Because the system can’t remove the interior’s humidity and cool the inside air to the set temperature, it keeps running.
  4. If the air filter is too “restrictive,” i.e., it’s designed to remove allergens and pollen, it can cause the unit to malfunction.
  5. A low refrigerant charge keeps the unit running as it works harder to cool your home.
  6. A faulty thermostat can cause the unit to not know when to turn off, even when the desired temperature is reached.
  7. Leaky ducts might be causing cool air to escape, which means your home never reaches the temperature set on the thermostat.
  8. A dirty or blocked condenser can impede airflow.
  9. Blower motor and fan issues can cause the HVAC system to lose efficiency, making it run constantly.
  10. If your AC unit is the wrong size for your home, it might not be able to cool the entire house.

HOW TO FIX COMMON AN AC UNIT THAT RUNS CONSTANTLY

Many issues that cause an air conditioner to run constantly can be avoided by regularly scheduled maintenance. Others require the skills and expertise of a trained and qualified HVAC technician. Here are some possible fixes for AC units that run continuously.

  1. Dirty evaporator coils and dirty or blocked condensers need to be kept clean of dirt and debris. If this is a frequent problem, make sure the area around the unit is clear and unlikely to muck up your system.
  2. If the evaporator coil is frozen, turn the unit off and call in a professional to diagnose the problem before it causes serious damage.
  3. When the problem is a dirty, clogged, or restrictive air filter, talk to your HVAC provider about which MERV value filter is best for your home. And make sure to change the filter regularly.
  4. A low refrigerant charge calls for an experienced HVAC service professional to locate and repair any leaks and then restore the refrigerant to the correct level.
  5. Faulty thermostats can sometimes be repaired, but in many cases, it’s wiser and more cost-efficient to replace a thermostat that’s no longer working properly.
  6. Blower and motor fan issues can sometimes be addressed by adjusting the fan speed, or the parts might need a good cleaning.

If you’ve recently added on, renovated, or changed the layout of your home, it’s possible your existing HVAC system is unable to cool the entire space. A certified HVAC technician can perform a load calculation and let you know if an air conditioner replacement is in order.

SCHEDULE A REPAIR CALL

If your home’s air conditioning unit runs constantly and you’re unable to solve or fix the problem yourself, contact Aladdin Air Conditioning & Heating to have one of our experienced HVAC technicians take care of the problem right away. You can contact us online or call us at (818) 697-8734.

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