If the refrigerant level drops too low, the low-pressure switch will prevent the compressor from running to avoid catastrophic damage to the system. When to Call a Professional While checking the thermostat setting and the breaker box are good first steps, complex issues like a faulty contactor, a failing capacitor, or a refrigerant leak require the expertise of a certified HVAC technician.
Quick Fixes for When Air Handler is Running but Outside Unit is Not Responding
Additionally, if the airflow is restricted due to a dirty evaporator coil or a clogged air filter, the system may overheat and trigger a shutdown, leaving the air handler running but unable to cool the space effectively. The air handler is the indoor component responsible for pulling warm air across the evaporator coil and pushing the cooled air through your ducts.
This specific scenario, where the air handler running but outside unit not operating, is one of the most common and frustrating HVAC issues homeowners face during peak summer heat. If it is not calling for cooling, or if it is malfunctioning, it will not send the signal to the outdoor unit.
Quick Fixes for an Air Handler Running but Outside Unit Not Responding
Standing in a stuffy room, you glance over at the outdoor unit and notice an unsettling silence. Safety Switch Malfunction: High-pressure or low-pressure switches prevent the system from running if it detects dangerously low refrigerant levels or a blockage.
More About Air handler running but outside unit not
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