Rheem AC Compressor Not Turning On? Quick Fixes & Tips

If your Rheem AC compressor is not turning on, check the thermostat settings and power supply. The issue may be resolved by adjusting the thermostat or checking the power source.

It’s important to troubleshoot the problem systematically to identify the root cause and determine the appropriate solution. In this blog post, we will explore common reasons why a Rheem AC compressor may not be turning on and provide step-by-step guidance on how to address this issue effectively.

By following these troubleshooting tips, you can potentially fix the problem and restore your AC unit to proper functioning.

Introduction To Rheem Ac Compressor Issues

Rheem AC compressor not turning on? This issue could be caused by a variety of factors, including a faulty capacitor, a malfunctioning thermostat, or a refrigerant leak. It’s important to have a professional HVAC technician diagnose and fix the problem to ensure optimal performance and energy efficiency.

Welcome to our blog post on Rheem AC compressor issues. The compressor plays a crucial role in the functionality of your Rheem air conditioning system. It is responsible for compressing the refrigerant, which allows it to cool the air before it is circulated throughout your home or office.

However, just like any other mechanical component, the compressor can experience problems over time. In this section, we will explore the common symptoms of compressor failure and highlight the importance of timely troubleshooting.

Common Symptoms Of Compressor Failure

Identifying the symptoms of compressor failure is essential for addressing the issue promptly. Here are some common signs that your Rheem AC compressor may not be turning on:

  • Warm air blowing from the vents
  • Unusual noises coming from the outdoor unit
  • Tripped circuit breaker or blown fuse
  • Constantly running fan without cool air
  • Ice buildup on the outdoor unit

If you notice any of these symptoms, it is crucial to take immediate action to prevent further damage to your Rheem AC system.

Importance Of Timely Troubleshooting

Timely troubleshooting of Rheem AC compressor issues is vital to ensure the efficient and effective functioning of your air conditioning system. Ignoring compressor problems can lead to more extensive damage and costly repairs. By addressing the issue promptly, you can:

  • Prevent complete compressor failure
  • Maximize the lifespan of your AC system
  • Save money on potential major repairs or replacement
  • Ensure optimal comfort in your home or office

Therefore, it is crucial to consult a professional HVAC technician to diagnose and resolve any Rheem AC compressor issues as soon as you notice the symptoms.

Safety First: Preparing For Repairs

When dealing with a malfunctioning Rheem AC compressor, it’s important to prioritize safety before attempting any repairs. Here are the essential steps to take to ensure a safe and efficient repair process.

Turning Off The Power

Before beginning any work on the AC compressor, ensure to switch off the power to the unit to prevent the risk of electric shock. This can typically be done by locating the electrical disconnect box near the compressor and switching it to the “off” position. It’s crucial to verify that the power is truly off by using a voltage tester before proceeding with any repairs.

Gathering The Right Tools

Equipping yourself with the necessary tools is vital for a successful repair. Make sure to have a set of insulated screwdrivers, wire cutters, wire strippers, and a voltage tester on hand. These tools will enable you to safely work with electrical components and troubleshoot any issues with the AC compressor.

Initial Checks: Simple Solutions

If your Rheem AC compressor is not turning on, there can be several reasons behind it. Before calling a professional, it’s a good idea to check some initial things yourself. Here are some simple solutions you can try before reaching out to an HVAC technician.

Inspecting Circuit Breakers And Fuses

One of the most common reasons for the Rheem AC compressor not turning on is a tripped circuit breaker or a blown fuse. It’s crucial to check your circuit breaker box and make sure the switch for your AC unit is in the ‘on’ position. If it’s in the ‘off’ position, flip it back to ‘on.’

Similarly, inspect the fuses in your AC unit and replace them if blown. You can easily find the fuses by opening the access panel on your AC unit and checking the fuse box.

Verifying Thermostat Settings

Another potential cause for your Rheem AC compressor not turning on could be an issue with the thermostat. Make sure your thermostat is set to ‘cool’ mode and the temperature is set lower than the current room temperature. If your thermostat has batteries, ensure they are not dead or dying.

Also, check the wiring connections between your thermostat and the AC unit. Loose or disconnected wires can prevent the compressor from turning on.

If the above solutions don’t work, it’s best to call a professional HVAC technician for further diagnosis and repairs. Don’t attempt to fix any electrical issues yourself if you’re not trained and experienced in electrical work.

Capacitor Problems: A Frequent Culprit

Capacitor problems are a common cause of the Rheem AC compressor not turning on. Faulty capacitors can lead to inefficient operation and system failure. It’s important to have a professional diagnose and fix the issue to avoid further damage to the system.

Capacitor Problems: A Frequent Culprit When your Rheem AC compressor is not turning on, there could be several reasons behind it. One of the most common culprits is a faulty capacitor. The capacitor is responsible for providing the initial jolt of energy required to start the compressor motor. A malfunctioning capacitor can cause the compressor to fail to start or run inefficiently.

Identifying capacitor issues Identifying a faulty capacitor is not always easy, but there are some signs you can look out for. Here are some common symptoms of a capacitor problem:

1. The AC unit won’t turn on

2. The AC unit makes a humming sound but doesn’t start

3. The AC unit turns off on its own

4. The AC unit blows warm air instead of cool air If you notice any of these issues, the capacitor is likely the culprit.

You can perform a visual inspection to see if the capacitor is swollen or leaking. If you notice any damage, it’s time to replace the capacitor. Steps for capacitor replacement Replacing a capacitor is a simple process that you can do yourself. Here are the steps:

1. Turn off the power to the AC unit

2. Locate the capacitor (usually located on the outside unit)

3. Discharge the capacitor by using an insulated screwdriver to touch the two metal contacts

4. Remove the wires from the old capacitor and take note of their placement

5. Install the new capacitor and reconnect the wires in their correct positions

6. Turn the power back on to the AC unit It’s important to note that capacitors store electrical energy, so it’s essential to discharge the old capacitor before removing it.

If you’re not comfortable with performing this task, it’s best to call a professional. In conclusion, capacitor problems are a frequent culprit when it comes to Rheem AC compressor issues. If you’re experiencing any of the symptoms mentioned above, it’s essential to inspect the capacitor for damage and replace it if necessary.

By following the steps outlined above, you can replace the capacitor yourself and get your AC unit back up and running in no time.

Refrigerant Levels: Impact On Compressor Function

Refrigerant levels play a crucial role in the proper functioning of your Rheem AC compressor. When the refrigerant charge is not at the appropriate level, it can significantly impact the compressor’s ability to operate efficiently.

Checking For Proper Refrigerant Charge

The first step in diagnosing why your Rheem AC compressor is not turning on is to check for the proper refrigerant charge. You can do this by using a refrigerant pressure gauge to measure the pressure levels in the system. If the pressure is too low, it can indicate a potential issue with the refrigerant charge.

Handling Low Refrigerant Scenarios

In the event of low refrigerant levels, it is important to address the issue promptly to prevent further damage to the compressor. You should consult with a qualified HVAC technician to assess and replenish the refrigerant to the appropriate level. This will help ensure that your Rheem AC compressor can function optimally and efficiently.

Electrical Failures: Wiring And Connections

One common reason for a Rheem AC compressor not turning on is due to electrical issues related to wiring and connections.

Assessing Electrical Connections

Start by checking all electrical connections to ensure they are secure and properly connected.

  • Inspect for any loose or corroded wires that may be causing the problem.
  • Make sure all connections are firmly in place to avoid disruptions in the electrical flow.

Troubleshooting Contactor Problems

If the electrical connections seem fine, the issue may lie with the contractor. Here’s what you can do:

  1. Check the contactor for signs of wear or damage that could be preventing it from engaging.
  2. Test the contact points for continuity to ensure proper functionality.

Compressor Overheating: Cooling Issues

Compressor overheating is a common issue that can lead to cooling problems with your Rheem AC system. When the compressor overheats, it can result in the AC compressor not turning on, causing discomfort in your indoor environment. Understanding the signs of overheating and implementing measures to improve compressor cooling can help address this issue effectively.

Identifying Signs Of Overheating

Signs of compressor overheating include the following:

  • Hot air coming from the vents
  • Unusual noises from the compressor
  • Tripped circuit breaker

Improving Compressor Cooling

To improve compressor cooling and prevent overheating, it’s important to take the following steps:

  1. Keep the area around the compressor clear of debris and obstructions
  2. Ensure proper airflow to the compressor by trimming vegetation and removing any obstacles
  3. Schedule regular maintenance to clean the coils and check refrigerant levels

Professional Help: When To Call A Technician

If your Rheem AC compressor is not turning on, it’s time to seek professional help from a technician. Don’t delay in getting the necessary expertise to diagnose and fix the issue, ensuring your AC system operates efficiently.

Complex Issues Requiring Expertise

When dealing with a Rheem AC compressor that refuses to turn on, it’s crucial to recognize the signs of complex issues that demand professional expertise. Attempting to troubleshoot intricate problems without the necessary skills and knowledge can lead to further damage and costly repairs. Therefore, it’s essential to understand the specific scenarios that call for the intervention of a qualified technician.

Benefits Of Professional Maintenance

Professional maintenance for your Rheem AC system offers a myriad of benefits. By scheduling regular inspections and tune-ups with a certified technician, you can ensure that your system operates at peak efficiency. Additionally, professional maintenance helps to identify and address potential issues before they escalate, ultimately extending the lifespan of your AC compressor and enhancing its overall performance.

Preventative Measures: Avoiding Future Problems

Rheem AC compressor not turning on can be a frustrating issue to deal with, especially during hot weather.

Regular Maintenance Tips

  • Clean or replace air filters every 1-3 months.
  • Check and clean the outdoor unit regularly.
  • Schedule professional maintenance at least once a year.

Investing In A Surge Protector

Protect your Rheem AC compressor by investing in a surge protector to safeguard it from power surges.

Conclusion: Ensuring Reliable Ac Performance

When your Rheem AC compressor is not turning on, it can be frustrating and uncomfortable, especially during hot weather. However, by following the troubleshooting steps and proper maintenance tips, you can ensure reliable AC performance and prolong the lifespan of your unit.

Recap Of Troubleshooting Steps

Before concluding, let’s recap the essential troubleshooting steps to address the issue of the Rheem AC compressor not turning on:

  1. Check the power supply and ensure the unit is plugged in.
  2. Inspect the thermostat settings and replace the batteries if necessary.
  3. Clean or replace the air filter to prevent airflow issues.
  4. Inspect the circuit breaker and reset if it has tripped.
  5. Examine the condenser unit for any debris or blockages.
  6. Contact a professional HVAC technician if the issue persists.

Final Thoughts On Caring For Your Rheem Ac

Regular maintenance and care for your Rheem AC are crucial in ensuring its optimal performance. By following the recommended maintenance schedule, including filter replacements, coil cleaning, and professional tune-ups, you can prevent potential issues and extend the lifespan of your unit.

Frequently Asked Questions

Why Is My AC compressor Not Kicking On?

The AC compressor may not be kicking on due to several reasons, such as a faulty thermostat, low refrigerant levels, a malfunctioning capacitor, or a blown fuse. It’s essential to check these components and, if necessary, contact a professional HVAC technician for proper diagnosis and repair.

Why Is My Rheem Compressor Not Kicking On?

Check if the thermostat is set correctly. Inspect for any tripped breaker or blown fuse. Ensure the capacitor is functioning.

How Do I Reset My Rheem Ac Compressor?

To reset your Rheem AC compressor, locate the electrical panel and turn off the power supply. Wait for 5 minutes, then turn the power back on. This will reset the compressor.

Why My Compressor Won’t Turn On?

A compressor may not turn on due to a tripped breaker, faulty wiring, or a malfunctioning motor. Check these components for issues.


If your Rheem AC compressor is not turning on, it is important to troubleshoot the issue to ensure optimal performance. Check the power supply, thermostat settings, and circuit breaker. If the problem persists, it may require professional assistance to diagnose and repair the compressor.

Remember to regularly maintain your AC system to prevent future breakdowns and extend its lifespan.

Scott Maupin