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HomeRepair HelpTappan Central A/C RepairTappan Central air conditioner compressor won't run Repair
Tappan Central air conditioner compressor won't run
If your Tappan central air conditioner compressor is not running, the compressor itself may be defective or worn out, but that is not usually the first part to replace. The most likely causes are a failed compressor, a burnt-out start capacitor, or a defective contactor that is not sending power to the condensing unit. Less common causes include a failed run capacitor, capacitor, or dual run capacitor, which help the compressor start and continue running. These problems can cause an AC compressor not running, an air conditioner compressor that won't start, or a central AC compressor not working even when the indoor blower operates. Before replacing the compressor, inspect the capacitors for bulging or leaking and check other components as described in the repair steps. Testing a compressor, capacitor, or contactor requires electrical knowledge and safe handling of stored charge. Turn off power at the disconnect box and circuit breaker, and do not work on 240-volt wiring unless qualified. Compressor replacement or any repair inside the sealed refrigerant system requires an EPA 608-certified, licensed HVAC technician. Enter your Tappan central air conditioner model number to find the exact replacement part for your specific system.
01 - Tappan Central Air Conditioner Compressor
The compressor is a pump which compresses the refrigerant and circulates the refrigerant through the evaporator and condenser coils. If the compressor is defective or worn out, it likely won't run. 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.
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Highly Likely
02 - Tappan Central Air Conditioner Start Capacitor
A start capacitor is often used to cycle on the compressor. If the capacitor burns out, the compressor may not run. The start capacitor can be tested with a multimeter to determine if the component can successfully hold and release its charge. If the capacitor is unable to hold and release a charge, or is bulging or leaking, the capacitor will need to be replaced.
Common
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 can prevent the compressor from running. To determine if the contactor is at fault, use a multimeter to test the contactor coil for continuity. If the contactor coil does not have continuity or the contacts a on the coil look burnt, replace it.
Common
04 - Tappan Central Air Conditioner Run Capacitor
A run capacitor will power either the compressor or the fan motor (a dual run capacitor will power both). If the capacitor burns out, the compressor may not run. To determine if the run capacitor has failed, test the capacitor with a multimeter. If the capacitor is unable to hold and release a charge or is bulging or leaking, replace it.
Less Common
05 - Tappan Central Air Conditioner Capacitor
The capacitor provides voltage to the compressor to start it. If the capacitor is defective, the compressor won't run. To determine if the capacitor has failed, test the capacitor with a multimeter. If the capacitor is unable to hold and release a charge or is bulging or leaking, replace it.
Less Common
06 - Tappan Central Air Conditioner Dual Run Capacitor
A dual run capacitor will power both the compressor and the fan motor. If the capacitor burns out, the compressor may not run. To determine if the dual run capacitor has failed, test the capacitor with a multimeter. If the capacitor is unable to hold and release a charge or is bulging or leaking, replace it.
Less Common
Frequently Asked Questions
Why is my Tappan AC compressor not running?
How do I test a Tappan AC start capacitor or run capacitor?
Can a bad contactor keep the AC compressor from starting?
How can I tell if the Tappan AC compressor itself is bad?
How do I find the correct Tappan AC compressor or capacitor replacement part?
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