What should you do if your air conditioner won’t cool below 75 degrees? There could be several reasons your AC is not cooling below 75 degrees. In this blog post, we’ll talk about some of the most common things that can go wrong with your air conditioner and how to fix them.
Depending on where you live, the ideal room temperature for an air conditioner is between 68 and 75 degrees Fahrenheit. So, you set your air conditioner’s thermostat to a temperature below 75 degrees, but you’ve noticed it’s having trouble getting to that temperature. What’s going on? Well, some things can go wrong with an air conditioner that keeps it from cooling your home.
Why my air conditioner won’t cool below 75 degrees?
There could be several reasons, and some common causes include the following:
- Dirty air filters: When the air filter is dirty, it can restrict airflow and cause the air conditioner to work less efficiently.
- Low refrigerant levels: If the air conditioner is low on refrigerant, it may not be able to cool properly. A leak in the system can cause your AC won’t cool below 75 degrees.
- Incorrect thermostat settings: Ensure the thermostat is set to the correct temperature and the cooling setting is turned on.
- Obstructed outdoor unit: If the outdoor unit is blocked by leaves, debris, or other obstructions, it may not be able to function properly.
- Leaky or improperly sized ductwork: If the ductwork is leaking or not properly sized, it can cause the air conditioner to work less efficiently.
- An old or undersized air conditioner: If your air conditioner is old or too small for the size of your home, it may need to catch up with the demand for cooled air.
Most of the time, your air conditioner won’t cool below the temperature you set because of the above things.
When it’s hot outside (the temperature is above 92 degrees), your air conditioner will also not work well. Air conditioners are made to work well when the temperature is below 92 degrees. It is made to cool your home by only 20 degrees below the temperature outside. If it’s hot outside, your air conditioner won’t cool down below 75 degrees either. By closing doors and windows, you can keep the hot outside air from entering your home.
What should I do when my ac not cooling below 75?
If you notice that your air conditioner isn’t cooling enough, you should first check your thermostat. Ensure that your thermostat is set to cool and not heat.
Here are a few other things you can try to troubleshoot AC not cooling below 75:
- Check the thermostat settings: Ensure the thermostat is set to the correct temperature and set to COOL mode.
- Check the air filter: A dirty air filter can restrict airflow and cause the air conditioner to work less efficiently. When your filters are dirty, they will let less air into your air conditioner. Because of this, only a small amount of the air in your home will be cooled and moved around. This makes your air conditioner work much less well.
- Check the outdoor unit: Make sure nothing is blocking the outdoor unit, such as leaves or debris.
- Check for refrigerant leaks: If your air conditioner is low on refrigerant, it may not be able to cool properly. You will need a professional to check for and fix any leaks.
- Check the ductwork: If the ductwork is leaking or not properly sealed, it can cause the air conditioner to work less efficiently. A professional HVAC technician can help you identify and fix any problems with the ductwork.
- Check the age and size of the unit: If your air conditioner is old or too small, it may not be able to keep up with the demand for cooled air. In this case, you may need to replace the unit.
The information below can help you figure out what size air conditioner you need for your home:
| Square Feet | AC Size (Tons) |
| 600-1,000 square feet | 1.5 tons |
| 1,000-1,500 square feet | 2 tons |
| 1,500-2,000 square feet | 3 tons |
| 2,000-2,500 square feet | 4 tons |
| 2,500-3,300 square feet | 5 tons |
If you have tried these steps and your air conditioner still won’t cool below 75 degrees, it may be time to call a professional HVAC technician. They can diagnose the problem and recommend a solution.
