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Why Isn’t My AC Keeping Up With the Thermostat Setting?

When your air conditioner runs constantly but never seems to cool your home to the thermostat setting, it’s more than just a comfort issue—it could signal a deeper problem. This frustrating issue not only affects your comfort but can also drive up your energy bills. If you’re wondering why your AC can’t keep up, especially during the hottest days, it’s time to look at the possible causes before things get worse.

1. Clogged Air Filters

One of the most common reasons your AC isn’t keeping up is a dirty air filter. When filters become clogged, airflow is restricted, which makes it harder for your system to circulate cool air. This not only reduces efficiency but also puts extra strain on the system, leading to wear and tear. Check your filters monthly and replace them every 1-3 months for optimal performance.

2. Refrigerant Issues

If your system is low on refrigerant, it won’t be able to absorb heat effectively. This means your AC will run longer, trying to cool your home but never quite getting there. Low refrigerant levels often point to a leak, which should only be diagnosed and repaired by a professional HVAC technician.

3. Undersized Unit

Was your air conditioner properly sized for your home? If your unit is too small for the space it’s trying to cool, it will constantly run without reaching the set temperature. This is a common problem in older homes or when an AC was installed without a proper load calculation.

4. Dirty Condenser Coils

Your outside AC unit has condenser coils that release heat from your home into the outside air. When these coils become dirty or covered in debris, heat transfer is reduced, and the cooling process slows down. Regular maintenance, including coil cleaning, can prevent this issue.

5. Ductwork Leaks

Leaky air ducts can waste a significant amount of cool air before it ever reaches your rooms. If your AC is working overtime but your home still feels warm, it might be because cooled air is escaping into the attic or crawlspace. A professional inspection can pinpoint leaks and improve efficiency.

6. Thermostat Malfunction

Sometimes, the problem isn’t the AC at all—it’s the thermostat. If it’s not reading the temperature accurately or isn’t communicating with your system correctly, it can lead to poor performance. Consider upgrading to a smart thermostat or having your current one checked.

7. Extreme Outdoor Temperatures

On exceptionally hot days, even a well-functioning AC system might struggle to reach your desired temperature. Homes with poor insulation or excessive sun exposure may need additional solutions like reflective window film or better insulation.

If you’re dealing with any of these issues, and especially if you need help with your air conditioning services in Wellington, it’s essential to have a trusted HVAC professional evaluate your system. Regular maintenance and timely repairs can make all the difference in performance and energy savings.

Schedule your service today with Seaside Air Services!

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