How To Change A Run Cap In Goodman Air Conditioner Unit

When your Goodman air conditioner isn't powering on as it should, one of the most common culprits is an issue with the run capacitor. When this happens, your only option is to replace it. If you would like to resolve this issue yourself, then keep reading.

To replace your run capacitor on your Goodman air conditioner, follow these steps:

  1. Turn off the A/C thermostat
  2. Turn off the HVAC breaker
  3. Open relay access cover
  4. Locate run capacitor
  5. Remove wires from a run capacitor with
  6. Replace new run capacitor
  7. Reconnect wires to a new capacitor
  8. Close relay access panel
  9. Turn on the HVAC breaker
  10. Set A/C thermostat to cool mode.

As you can see, replacing the run capacitor is something you can do on your own without too much difficulty. However, in this article, we will dive deeper into the process to better understand what is happening and what you need to do. In addition, we will answer other frequently asked questions about the Goodman air conditioner, so read on!

Air conditioner unit and its most common culprits of an issue, How to Change A Run Cap In Goodman Air Conditioner Unit

How To Change A Run Cap In Goodman Air Conditioner Unit

A capacitor is an electrical component that helps regulate the flow of electricity. For example, the capacitor helps start the compressor in an air conditioner.

When the compressor starts, it pulls in a large amount of current, and the capacitor helps regulate the flow of electricity so that it doesn't overload the system. The capacitor is located in the outdoor unit of the air conditioner.

If your Goodman air conditioner isn't starting up, one of the first things you should check is the run capacitor. If it's damaged, you'll need to replace it. Follow these steps to replace the run capacitor:

Ac capacitor need to be checked montly for good condition of your ac

Turn off the A/C thermostat

The first step is to turn off the A/C thermostat. This will prevent any possible electrical shocks.

Turn off the HVAC breaker

The next step is vital, turn off the HVAC breaker. This will completely shut off power to the air conditioner. The run capacitor can have dangerous electrical currents running through it, so it's important to be safe and shut off the power.

Open relay access cover

After you are sure all power is off, you can begin to locate and remove the relay access cover from your Goodman air conditioner. Typically, this is held together by two screws.

If you are unsure where the relay access cover is, check the owner's manual for a diagram of your specific air conditioner.

Locate run capacitor

Now that you have access to the inner workings of your Goodman air conditioner, you need to locate the run capacitor. It will be a cylindrical object with two metal terminals. Again, it's important to note which terminal is connected to which wire.

Remove wires from a run capacitor

When removing the wire terminals from the old capacitor, be careful not to damage or mix up the wires. If the terminals are tough to remove, you can use a rubber handle needle nose pliers, or a flat-head screwdriver with a rubber handle.

We say rubber handle because if you use metal tools, there is a possibility that there is still electrical current running through the capacitor, and you could get shocked.

Replace new run capacitor

Replacing capacitor from the old run capacitor to run full capacity of an ac

Once you have safely removed the old run capacitor, it's time to replace it with a new one. Be sure to connect the terminals to the correct wires! Ensure that the terminal wires are tight against the capacitor.

Close relay access panel

Close up the relay access panel once you connect the new capacitor and screw it in place.

Turn on the HVAC breaker

Now it's time to turn the power back on. Turn on the breakers in the same order that you turned them off.

Set A/C thermostat to cool mode

Last but not least, set your A/C thermostat to cool mode. And you're done! Goodman air conditioners are known for their reliability and easy-to-use controls, so you can be sure your home will be cool and comfortable in no time.

If everything went well and the capacitor was the source of the problem, your Goodman air conditioner should be up and running like new. If not, keep reading for other possible causes of why your Goodman air conditioner isn't starting.

Why isn't my air conditioner turning on?  Air conditioner defects and tricks on how to troubleshoot the issue

The capacitor isn't the only part needed to start an air conditioner. If the capacitor is working, but the unit still isn't starting, then there might be another issue at hand.

Check the following parts to see if they might be the source of the problem:

Tripped Breaker

If the breaker controlling your air conditioner has been tripped, reset it and see if that does the trick.

Blown Fuse

Like a tripped breaker, a blown fuse will prevent power from reaching your air conditioner. Check the fuses with a voltmeter to see if they are blown.

Clogged Air Filter

A clogged air filter can restrict airflow and cause your air conditioner to overheat. The air filter should be cleaned every two weeks. In addition, be sure to replace the air conditioner filter every 30 days to every six months, depending on the type of filter.

Dirty Evaporator Coils

If the evaporator coils are dirty, they won't absorb heat properly, and the air conditioner will have to work harder to cool the air. Therefore, the coils should be cleaned every year.

Clogged/Dirty Condenser Lines

Dirty condenser makes air flow wont work properly

If the condenser lines are clogged or dirty, the refrigerant won't flow properly, and the air conditioner will stop working.

Bad Motor

If the motor is bad, the air conditioner won't start no matter what you do. In this case, you have two options: replace the motor or replace the entire air conditioner.


The compressor is responsible for circulating the refrigerant throughout the air conditioner. Therefore, the compressor is an integral part of the system and can cause it to stop working altogether.


If the compressor is working, but the air conditioner still isn't starting, it might be because there's not enough refrigerant. Refrigerant is what cools and dehumidifies the air in your home. In addition, you could have a refrigerant leak, which will need to be repaired by a professional.

Bad Control Board

The control board is responsible for telling the different parts of the air conditioner what to do. If the control board is bad, it could be preventing your air conditioner from starting.


The thermostat is what tells the air conditioner when to turn on and off. If the thermostat is old, has bad batteries, or is faulty, it might be preventing the air conditioner from starting.

If you've checked all of these parts and your Goodman air conditioner still isn't working, then it's time to call a professional. A trained technician will be able to diagnose and fix the problem in no time.

Purpose of thermostat on air conditioner

How long does a Goodman air conditioner last?

Goodman air conditioners are built to last. A Goodman air conditioner can last 10-15 years with proper maintenance. If your Goodman air conditioner is around this age and you are experiencing problems, it might be time to consider a replacement.

How often should I service my Goodman air conditioner?

Goodman fee of its repair labor and maintenance

It's recommended that you have your Goodman air conditioner twice yearly. Once in the fall and once in the spring. This will help prolong the unit's life and keep it running efficiently.

How do you know when to replace your Goodman air conditioner?

There are a few signs that it might be time to replace your Goodman air conditioner:

Old age

As mentioned earlier, Goodman air conditioners can last 10-15 years with proper maintenance. If your unit is getting close to this age, it might be time for a replacement.

Constant repairs

If you feel like you are constantly chasing repair after repair, it is is a sign that the parts are wearing down, and it might be time for a new air conditioner.

High energy bills

Spiking Bills of electricity   

When looking at your energy bills and noticing a sudden spike, it might be a sign that your Goodman air conditioner is not working as efficiently as it should be.

Inconsistent cooling

If you notice that your system is cooling inconsistently, meaning some rooms are too hot or too cold, it might signify a bigger problem.

It could be low refrigerant levels, dirty coils, or a bad compressor. Regardless of the cause, it is a sign that your Goodman air conditioner is not working correctly and might need to be replaced.

Increased Moisture

Increased moisture in and around the unit and in your home is a sign of a refrigerant leak. Your Goodman air conditioner will not work correctly without the proper amount of refrigerant and will need to be replaced.

Refrigerant is also dangerous when consumed or inhaled, so it is essential to have a professional repair the leak as soon as possible.

Unusual Sounds

Twice yearly for recommending a goodman air conditioner

If you start to hear strange sounds coming from your Goodman air conditioner, it is a sign that something is wrong. The sounds could be a sign of loose or failing components and should be looked at by a professional.

Final Thoughts

Air conditioner unit and its most common culprits of an issue

If you are experiencing problems with your Goodman air conditioner, you can diagnose and fix the issue yourself or call a professional. A trained technician will be able to diagnose and fix the problem in no time.

Like this article? Here are a few more that you might enjoy:

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