.jpg)
If your indoor fan is running but the outdoor unit, including the compressor, isn't turning on, your air conditioner won't actually be cooling your home despite appearing to be somewhat active. Old Glory Air Conditioning and Heating explains common causes behind this issue.
Before assuming a more significant problem, checking that the outdoor unit's dedicated breaker hasn't tripped, and that the outdoor disconnect switch is in the on position, is a reasonable first step.
The compressor relies on a capacitor to provide the initial energy boost needed to start running. A failed capacitor is one of the most common reasons a compressor won't engage, even when power is otherwise reaching the unit.
The contactor is an electrical switch that allows power to flow to the compressor when your thermostat calls for cooling. If this component fails, the compressor may not receive the signal to start at all.
Many compressors include built-in overload protection that shuts the unit down if it detects unsafe operating conditions, such as overheating, which can prevent the compressor from starting until the underlying issue is resolved.
In some cases, particularly for older systems, the compressor itself may be failing due to internal wear, which can prevent it from starting reliably or at all, representing a more significant repair or replacement consideration.
If your thermostat isn't properly communicating the call for cooling to your outdoor unit, whether due to wiring issues or a malfunctioning thermostat, the compressor may never receive the signal to start.
Repeatedly cycling the system in hopes the compressor will eventually start can potentially cause further electrical strain or damage, making it worth having a professional diagnose the specific cause rather than continuing to try on your own.
Because several different components could be responsible for a compressor not starting, ranging from a simple capacitor replacement to a more involved compressor issue, professional diagnosis is the most reliable way to identify and address the actual cause.
If your AC's compressor won't turn on, our technicians can quickly diagnose the issue and provide the appropriate repair to restore reliable cooling to your home.
