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Experiencing an air conditioner going for walks but now not cooling is a commonplace but frustrating trouble many homeowners face. It’s baffling whilst the AC unit is running but not lowering the temperature, mainly in the course of top summer time months. This guide delves into the myriad motives behind why your AC is running but not cooling the house, offering sensible solutions for brands like Lennox AC and others. Whether it is an airflow hassle or a mechanical hiccup, understanding those troubles lets you repair your house’s comfort.

Understanding How AC Works 

Before diving into troubleshooting, it is critical to apprehend the fundamentals of air conditioning maintenance. An air conditioner operates via extracting warm air from your private home, cooling it over evaporator coils filled with refrigerant, after which recirculating the chilled air lower lower back into the living area. When your AC runs however isn’t cooling, it indicates a hiccup on this technique, which can be because of numerous reasons, from easy fixes to extra critical problems.

Common Causes for AC Not Cooling 

  • Dirty Air Filter: One of the most not unusual reasons for an air conditioner no longer blowing bloodless air but jogging is a dirty air clear out. A clogged clear out restricts airflow, hindering the gadget’s cooling efficiency. Regular cleansing or replacing the air filter is an easy yet effective repair.
  • Incorrect Thermostat Settings: Incorrect thermostat settings also can lead to your AC strolling however no longer cooling. It’s essential to make sure the thermostat is set to “cool” and the temperature is lower than the cutting-edge room temperature.
  • Refrigerant Leaks: Refrigerant is vital for cooling the air. Leaks can result in inadequate cooling. This difficulty is more complicated and commonly requires expert intervention, as it includes coping with potentially hazardous materials and fixing the leak.
  • Frozen Evaporator Coils: Evaporator coils can freeze because of low refrigerant or bad airflow, mainly due to a lack of cooling strength. Thawing the coils and addressing the underlying difficulty is essential for restoring function.
  • Dirty Condenser Coils: The condenser coils, located within the outside unit, can emerge as grimy and hinder the warmth dispersal manner. Cleaning those coils is important for keeping the performance of your AC.
  • AC Won’t Keep Up: If your AC might not keep up with cooling demands, it can be due to being undersized to your area or suffering in excessive temperatures.
  • Electrical Issues: Electrical additives like capacitors or contactors can fail, hindering the air conditioner’s capability. These require a professional’s diagnosis and restore.
  • Ductwork Problems: Leaks, blockages, or poor design in your ductwork can considerably lessen cooling performance, as cool air can be lost before it reaches your residing areas.
  • Thermostat Sensor Problems: A malfunctioning thermostat sensor can supply incorrect readings, causing the AC to run inadequately. Recalibrating or changing the sensor is frequently vital.
  • Age and Wear of the AC Unit: Over time, AC gadgets can lose efficiency because of wear and tear. Older devices may warfare to cool efficiently, indicating the need for repair or substitute.
  • Improper Installation: If your AC changed into no longer hooked up correctly, it would lead to numerous issues, such as inefficient cooling. Ensuring proper set up is key to ideal overall performance.
  • High Humidity Levels: High indoor humidity can make the air experience hotter than its miles, even if the AC is running efficiently. Using dehumidifiers along with your AC can assist.

When to Call a Professional 

While a few problems, like changing a filter or adjusting thermostat settings, can be DIY, others call for professional knowledge. Complex troubles like refrigerant leaks, electrical issues, or Lennox AC no longer cooling situations frequently require the capabilities of an authorized technician. If fundamental troubleshooting doesn’t clear up the problem, it’s time to search for expert help.

Preventative Maintenance Tips 

Regular maintenance is essential for heading off eventualities wherein your air conditioner is jogging however not cooling. Here are essential hints:

  • Regular Filter Replacement/Cleaning: Ensure your air filter is easy to maintain airflow and performance.
  • Outdoor Unit Maintenance: Keep the vicinity round your outside unit clean of particles and foliage.
  • Annual Professional Checks: Have a professional look into and provider your AC yearly to preempt problems.
  • Home Insulation: Proper insulation reduces cooling needs in your AC.
  • Regular Coil Cleaning: Clean your evaporator and condenser coils periodically to prevent buildup which can obstruct performance.
  • Thermostat Upgrades: Consider upgrading to a smart thermostat for greater specific control over your AC’s operation.


Dealing with an AC unit strolling but not cooling can disrupt your comfort and peace of mind. By information not unusual causes and answers, you may regularly fast identify and address many issues. However, bear in mind that a few fixes require professional knowledge. Keeping up with regular upkeep is the first-class manner to make sure your air conditioner remains green and effective. Stay cool!

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