Quick answer
An AC that is not cooling can have an airflow, control, equipment or capacity problem. Before assuming the system is undersized or needs replacement, first establish whether it is operating normally.
In this Article
Narrow cooling complaints into airflow, controls, equipment or capacity. The useful interpretation comes from the combination of facts, not from repeating a generic answer. Separate operating faults from sizing and replacement decisions; do not diagnose refrigerant or electrical faults remotely.
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Narrow cooling complaints into airflow, controls, equipment or capacity. The useful interpretation comes from the combination of facts, not from repeating a generic answer. Separate operating faults from sizing and replacement decisions; do not diagnose refrigerant or electrical faults remotely.
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Narrow cooling complaints into airflow, controls, equipment or capacity. The useful interpretation comes from the combination of facts, not from repeating a generic answer. Separate operating faults from sizing and replacement decisions; do not diagnose refrigerant or electrical faults remotely.
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Narrow cooling complaints into airflow, controls, equipment or capacity. The useful interpretation comes from the combination of facts, not from repeating a generic answer. Separate operating faults from sizing and replacement decisions; do not diagnose refrigerant or electrical faults remotely.
What the symptom can point to
Cooling and heating complaints can start with airflow restrictions, controls, equipment faults, duct conditions or a real load/capacity mismatch. Treat sizing as a later question unless the system is first shown to be operating normally.
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Safety and limitations
Do not instruct users to open electrical compartments or handle refrigerants.
Related homeowner questions
What should I do if my air conditioner is running constantly?
An AC that is not cooling can have an airflow, control, equipment or capacity problem. Before assuming the system is undersized or needs replacement, first establish whether it is operating normally.
Condenser repeatedly turning on/off in high temps?
An AC that is not cooling can have an airflow, control, equipment or capacity problem. Before assuming the system is undersized or needs replacement, first establish whether it is operating normally.
How do I stop my air conditioner from running constantly?
An AC that is not cooling can have an airflow, control, equipment or capacity problem. Before assuming the system is undersized or needs replacement, first establish whether it is operating normally.
Why is my AC not shutting off?
An AC that is not cooling can have an airflow, control, equipment or capacity problem. Before assuming the system is undersized or needs replacement, first establish whether it is operating normally.
Is it normal for AC to run every 20 minutes?
An AC that is not cooling can have an airflow, control, equipment or capacity problem. Before assuming the system is undersized or needs replacement, first establish whether it is operating normally.
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