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AC Hot Spots: Why is One Room in My House Always Hot?

Updated: Aug 6

When summer temperatures rise, your central air conditioning system is essential for keeping your home cool and comfortable. However, it's not uncommon to find certain rooms that remain stubbornly warm despite the AC running full blast. These hot spots can be frustrating and uncomfortable. In this post, we explore the common reasons for AC hot spots and provide practical solutions to ensure every room in your home stays cool.


Couple sitting inside on sofa sweating because of AC hot spot

Common Reasons for Hot Spots in Central Air-Conditioned Homes

1. Poor Insulation:

Inadequate insulation can cause certain areas of your home to lose cool air rapidly. Older homes are particularly prone to this issue, resulting in inconsistent temperatures.

 

2. Blocked or Leaky Ducts:

Air ducts that are blocked, damaged, or leaking can prevent cool air from reaching certain rooms. This can cause significant temperature differences within your home.

 

3. Incorrectly Sized AC Unit:

An AC unit that is too small for your home will struggle to cool all areas effectively. Conversely, an oversized unit can cycle on and off too quickly, leading to uneven cooling.

 

4. Poor Airflow:

Furniture, curtains, or other obstructions can block air vents, restricting airflow. Additionally, rooms with closed doors can trap air and prevent proper circulation.

 

5. Thermostat Location:

A thermostat placed in a particularly cool or hot spot can misread the overall temperature of your home, leading to uneven cooling.

 

How to Fix a Room That is Always Hot in Summer

1. Improve Insulation:

Adding insulation to your attic, walls, and floors can help maintain a consistent temperature throughout your home. Weather stripping windows and doors can also prevent cool air from escaping.

 

2. Inspect and Clean Ducts:

Regularly check your ducts for leaks or blockages. Cleaning the ducts and sealing any leaks can improve air distribution and ensure every room receives sufficient cool air.

 

3. Upgrade or Right-Size Your AC Unit:

Consult with an HVAC professional to determine if your AC unit is appropriately sized for your home. Upgrading to a more efficient model can also enhance overall cooling performance.

 

4. Optimize Airflow:

Ensure that air vents are unobstructed by furniture or other items. Consider using fans to promote air circulation and keep doors open to allow air to flow freely between rooms.

 

5. Reposition the Thermostat:

Move your thermostat to a central location that accurately reflects your home's average temperature. This will help your AC unit maintain a consistent climate.

 

Trust Extreme Air to Fix Those AC Hot Spots

By understanding the causes of hot spots and implementing these solutions, you can enjoy a consistently cool home even during the hottest days of summer. Don't let uneven cooling disrupt your comfort—take action to keep your air conditioning system running efficiently.


If you're still experiencing hot spots in your home despite trying these solutions, it may be time to seek professional help. Extreme Air has trained HVAC professionals ready to help Southern California and St. George homeowners diagnose and address issues affecting AC system performance.


Contact us today to schedule an appointment and ensure your home stays cool and comfortable all summer long!

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