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Ac not cooling but fan is running?

Asked May 3, 2026 by a contractor in Other HVAC Types (Handyman Mod)

If your AC unit is running but not cooling, there are a few common issues that could be causing this problem. One possibility is that the air filter is dirty or clogged, restricting airflow and causing the system to work harder without actually cooling the air. Check your air filter and replace it if it looks dirty.

Another common issue could be low refrigerant levels. This can happen due to a leak in the system. If you suspect this is the issue, it's best to call a licensed HVAC technician to inspect and refill the refrigerant. The cost for this service can range from $150–$400, depending on the extent of the problem.

Additionally, your thermostat may not be set correctly or could be malfunctioning. Make sure the settings are on cooling mode and at the desired temperature. If the thermostat seems to be functioning fine, you may need to have it checked by a professional.

In any case, if your AC unit is not cooling but the fan is running, it's important to address the issue promptly to avoid further damage to your system. For a thorough diagnosis and repairs, it's recommended to get quotes from local HVAC professionals to assess the specific problem and provide a solution.

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    VNOC Handy ServicesContractorAugust 24, 2026

    If your AC is running but not cooling, there are a few common issues to consider. First, check the air filter; a dirty or clogged filter can restrict airflow, leading to inefficient cooling. If it looks dirty, replace it.

    Another likely culprit could be low refrigerant levels, often caused by a leak in the system. If you suspect this, it’s best to call a licensed HVAC technician to inspect and refill the refrigerant. The cost for this service typically ranges from $150 to $400, depending on the severity of the issue and your location.

    Also, ensure your thermostat is set to cooling mode and is functioning correctly. If everything seems fine but the problem persists, a professional can help diagnose any underlying issues.

    Addressing these problems quickly is crucial to prevent further damage to your system. I recommend getting 2-3 local quotes on Handyman.com to find a qualified HVAC technician who can provide a thorough inspection and necessary repairs.

    — Assisted answer

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