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Central air conditioner not cooling

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Common solutions for: Central air conditioner not cooling
Solution 1:
Contactor
The furnace control board sends a low voltage signal to the contactor. When the contactor receives the signal from the control board, it closes the circuit, sending voltage to the condensing unit comp...onents. If the contactor is defective, it will not provide voltage to the condensing unit. To determine if the contactor is at fault, use a multimeter to test the contactor for continuity. If the contactor does not have continuity, replace it.
Required Part
Central Air Conditioner Contactor
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Solution 2:
Dual Run Capacitor
If the dual run capacitor is defective, the fan motor might be noisy, overheat, or not run at all. To determine if the dual run capacitor has failed, inspect the capacitor. If the dual run capacitor i...s bulging or leaking, replace it.
Required Part
Central Air Conditioner Dual Run Capacitor
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Solution 3:
Incoming Power Problem
The central air condensing unit is energized with 240 volts of electricity. The electricity flows through a disconnect box to the compressor and condenser fan motor. The disconnect box enables the air conditioning unit to be turned off outside. The disconnect box includes a cartridge which may contain fuses. If the compressor and condenser fan motor do not run, the disconnect box fuses may have blown, or the circuit breaker that supplies power to the disconnect box may have tripped. To determine if the disconnect box fuses have blown, use a multimeter to test the fuses for continuity. If the disconnect box fuses do not have continuity replace them.
Solution 4:
Capacitor
If the capacitor is defective, the fan motor might be noisy, overheat, or not run at all. To determine if the capacitor has failed, inspect the capacitor. If the capacitor is bulging or leaking, repla...ce it.
Required Part
Central Air Conditioner Capacitor
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Solution 5:
Condenser Fan Motor
To determine if the condenser motor is working, use a multimeter to test the incoming voltage to the motor. If the condenser fan motor is receiving the correct voltage but the motor still won’t run, i...nspect the capacitor to ensure that it is not at fault. If the capacitor is not bulging or leaking, replace the condenser fan motor.
Required Part
Central Air Conditioner Condenser Fan Motor
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Solution 6:
Run Capacitor
If the run capacitor is defective, the fan motor might be noisy, overheat, or not run at all. To determine if the run capacitor has failed, inspect the capacitor. If the run capacitor is bulging or le...aking, replace it.
Required Part
Central Air Conditioner Run Capacitor
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Solution 7:
Compressor
The compressor is a pump which compresses the refrigerant and circulates the refrigerant through the evaporator and condenser coils. If the compressor is not working, the central air conditioner won’t... cool. However, this isn’t usually the case. Before replacing the compressor, first check all of the more commonly defective components. If all of the other components are working properly, use a multimeter to test the compressor for continuity. If there is an open circuit, the compressor is likely defective. If the compressor is defective, it must be replaced by a licensed technician.
Required Part
Central Air Conditioner Compressor
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