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Tappan Central air conditioner not cooling properly

If your Tappan central air conditioner is not cooling properly, start with airflow, the most common cause of central air not cooling or an air conditioner not blowing cold air. A clogged air filter, blocked registers, or dirty blower wheel can restrict airflow, freeze the evaporator coil, and lead to AC blowing warm air. Next, check the contactor, which sends power to the condensing unit, and the dual run capacitor, which can make the condenser fan motor noisy, overheated, or unable to run. If airflow is good and the evaporator and condenser coils are clean, a refrigerant leak or restriction in the sealed system may be preventing cooling. A relay board or, less commonly, the main control board may also keep the blower motor or contactor from receiving power. You can safely replace an air filter and inspect accessible parts with power disconnected, but testing or replacing components in the 240-volt condensing unit requires appropriate electrical training. Any refrigerant or sealed-system repair requires EPA 608 certification and a licensed HVAC technician. Enter your Tappan model number to find the exact replacement air filter, capacitor, contactor, relay board, or control board for your central air conditioner.

01 - Tappan 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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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.
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03 - Tappan 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 - Tappan 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 - Tappan 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 Tappan central air conditioner not cooling properly?
Why is my Tappan AC not blowing enough air or forming ice on the evaporator coil?
Why is my Tappan AC condenser not turning on?
What causes a Tappan condenser fan to make noise or stop running?
How do I find the correct replacement part for my Tappan central air conditioner?

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