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Nordyne Central air conditioner not cooling properly

If your Nordyne central air conditioner is not cooling properly, start with the most likely cause: an airflow problem. A clogged air filter or blower wheel can restrict air, cause the evaporator coil to freeze, and leave your home with an air conditioner not blowing cold air. Replace the filter, check that registers are open, and make sure furniture or rugs are not blocking airflow. Next, the contactor may be defective and unable to send power to the condensing unit, or a failed dual run capacitor may cause the condenser fan motor to run noisily, overheat, or stop. If the blower motor is not receiving power, a relay board may be faulty. A defective furnace main control board is less common but can prevent the contactor from receiving 24 volts or keep the blower motor off. If airflow is good, the coils are clean, and the fans and compressor run but the central air is still not cooling, a refrigerant leak or restriction in the sealed system is likely. Turn off power before inspecting components, and leave 240-volt testing or replacement to a qualified technician. Any refrigerant or sealed-system repair requires EPA 608 certification. Enter your model number to find the exact Nordyne replacement part for your central air conditioner.

01 - Nordyne Central Air Conditioner Main Control Board

If the central air condensing unit contactor is not receiving 24 volts or power is not getting to the furnace blower motor, a possible cause is a defective furnace main control board. While this is not a common problem, if all other potentially faulty components are working properly, the main control board should be replaced.
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Top Solution

02 - Air Flow Problem

Proper air flow is critical for the central air conditioner to work properly. The evaporator needs proper air flow to keep the condensing water from freezing. If the air filter or blower wheel gets clogged, ice can start forming on the evaporator coils, eventually freezing them up and preventing proper air flow. It is recommended to replace the air filter at least every 6 months or sooner depending on the conditions. Refer to owner's manual for guidance. Avoid covering registers with furniture, rugs, or other items that will restrict the air flow.
Top Solution

03 - Nordyne Central Air Conditioner 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 components. 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.
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Highly Likely

04 - Nordyne Central Air Conditioner 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 is bulging or leaking, replace it.
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Highly Likely

05 - Sealed System Problem

If the unit has good air flow, the evaporator and condensing unit coils are clean, the fan and compressor are running, and the furnace blower is on, but there is still not enough cooling, it is likely there is a leak or restriction in the sealed system. Since diagnosing and repairing a sealed system takes specialized tools and knowledge, a qualified service technician should diagnosis and repair the unit.
Highly Likely

06 - Nordyne Central Air Conditioner Relay Board

A relay board is often used to control components of an a central air condidtioner. If the blower motor is not receiving power, the relay board is likely the cause. A defective relay board will need to be replaced.
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Common

Frequently Asked Questions

Why is my Nordyne central air conditioner not cooling properly?
Why is my central AC blowing weak air, or why is the evaporator coil freezing up?
What should I check if the Nordyne condenser fan is not running or the outdoor AC unit is not turning on?
Why does my Nordyne AC still not start after I replace the filter and check the capacitor?
How do I find the correct Nordyne central air conditioner replacement part?

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