Rheem Airconditioner Problems: 7 Common Issues (Must Read)

Summers are about to grace our lives in full swing, and air conditioners are the go-to appliances to remove the scorching heat.

But often, this bliss can be interrupted by an appliance fault that will leave you drenched in sweat, cursing the maker of your air conditioner.


To save you time and the hassle of bringing in a technician to fix the appliance for you, we list some of the common problems with Rheem air conditioners and how to solve them.

Continue reading to learn more.

7 Common Problems with Rheem Air Conditioners (Must Know)

Here’s our list of the 7 most common Rheem Air conditioners problems with solutions.

Rheem AC Not Turning On

At times, your Rheem AC won’t turn on, no matter what buttons you press.

If that’s the case, Rheem AC not turning is typically caused by a simple power failure or tripped circuit. 

Try not to fret, instead work through the steps below

Possible solution(s):

  • If you’re lucky, your AC might be having trouble turning on only due to a simple power failure such as a loose power cable or a tripped circuit breaker. So, check the main power cable of your AC along with its circuit breaker switch, making sure both are in place.
  • If the AC appears to be getting a constant supply of electricity, then the problem might be inside your AC’s system. Your AC may have some broken wires that are not allowing current to pass. To fix this issue, you will need to call a professional.

Rheem AC Blowing Warm Air

It can be quite frustrating when your AC blows hot, as it can ruin the temperature of your entire home.

Rheem AC blowing hot air is typically caused by an incorrect thermostat or an issue with the compressor. 

However, you can deal with this issue by reading the causes and solutions below.

Possible solution(s):

  • Typically, this problem can be easily fixed by simply checking the thermostat settings. If your thermostat has been switched to “on” instead of “cool” or “auto,” the AC will constantly blow air even if it isn’t cooling. Changing this setting will allow your AC to start cooling again.
  • If the thermostat settings appear to be fine, the problem may be with your compressor. To test the compressor, turn off the AC for at least 30 seconds and listen to the sound of the compressor starting after turning the AC on. If the compressor doesn’t start after a few minutes, you will need to replace it. 

Rheem AC Working at the Wrong Temperature

If you’re noticing your Rheem AC is working at temperatures you didn’t set, you may be facing a common problem.

Rheem AC working at the wrong temperature is typically caused by a faulty thermostat. 

Continue reading to find the solution to your issue.

Possible solution(s):

  • The thermostat is the main component of your AC that controls the temperature. With the thermostat broken, your AC will have trouble functioning at the right temperature. However, testing and replacing the thermostat can be complicated, so call in a professional to do the work for you.
  • In case the thermostat has been tested to work properly, the reason behind an inaccurate AC temperature may be a refrigerant leak. To handle this issue, you will need to call a professional.

Rheem AC is Leaking Water Excessively

It’s expected for a Rheem AC to produce water through condensation.

However, if you start to notice water puddles and excess water leakages, there’s something wrong with your AC.

Rheem AC leaking water excessively is typically caused by a dirty air filter or blocked pipe 

Continue reading to find out what may be wrong and how to fix it. 

Possible solution(s):

  • A dirty air filter will block the flow of air, causing coils inside the AC to freeze when the frozen components thaw, and excess water starts to leak outside the AC. So, open your AC unit and clean your filter thoroughly to reduce water leakage.
  • A PVC pipe known as a drain line is used to move the condensation outside in a drain. However, if this pipe becomes clogged, the water can start to leak elsewhere. Check the drain line for blockages and remove them to fix your AC.

Rheem AC Unresponsive to Remote Control

The remote control is a useful tool for changing the settings of your Rheem AC.

However, it can be a frustrating problem when the AC doesn’t respond to it.

Unresponsive Rheem AC remote control is typically caused by low batteries or problems with the main control board

To deal with this problem, refer to the causes and solutions mentioned below.

Possible solution(s):

  • The reason why your AC doesn’t respond to the remote control could just be low battery. So, a quick fix to this problem is to simply replace the batteries in your remote control.
  • The main control board of your AC contains an infrared receiver to catch the signals coming from the remote control. If the receiver fails to function, the AC won’t be able to respond to the remote control. To fix the receiver, you will need to open the unit and replace the main control board.

Rheem AC Weak Airflow

From time to time, your Rheem AC will function but with little to no airflow.

Rheem AC having weak airflow is typically caused by obstruction or dirt in the vents or filters. 

However, this problem can usually be easily dealt with.

Continue reading the causes and solutions below to solve your problem.

Possible solution(s):

  • Weak airflow is usually due to some obstruction inside the outdoor or indoor vents. Open the vents and clean them thoroughly to allow optimal airflow. Additionally, clean the air filter as well to allow air to pass through it with ease.
  • If the vents and filters appear to be clean, the fan may have a problem. Open the AC unit and look for obstructions between the fan blades. Furthermore, tighten the fan axle if it appears to be loose. If the AC still has weak airflow, the fan motor may need to be replaced.

Rheem AC is Making Noise

Sometimes your Rheem AC might produce more noise than expected.

Rheem AC making too much noise is typically caused by dirt or debris caught inside your air conditioner. 

This is a common problem and can be solved easily by reading the below-mentioned causes and solutions.

Possible solution(s):

  • One of the most common culprits behind noise is debris inside the AC. Open up your unit and check for debris stuck inside fans, filters, and other areas. Removing the debris will significantly reduce the extra noise
  • Fan motors contain ball bearings that can produce noise when their lubrication wears off. To reduce this noise, you will need to replace the fan motor or the ball bearings inside. 

Rheem AC produces an unpleasant smell

Rarely this happens, but Rheem AC producing an unpleasant smell is typically caused by mold or refrigerant leak. 

A refrigerant leak is likely if your mini-split smells like fish, or vinegar or has a sweet odor. A lack of chilled air is another tell-tale sign that you don’t have enough refrigerant.

If you’re dealing with this issue, it’s best to use some of the solutions mentioned below as soon as possible.

Possible solution(s):

  • If your AC has been spreading an unpleasant smell, it could be due to the presence of mold. After all, the humid internal environment of an AC is the perfect place for mold to grow. You will need to contact a professional to get rid of the mold for you.
  • If mold isn’t a problem and your AC is still spreading a bad smell, your LG AC might have an issue with its components. Overheated parts can easily spread a burning smell. Additionally, a gas leak can produce the smell of rotten eggs. To fix faulty components, call in a professional.

How Long Do Rheem Airconditioners Last?

Rheem is a respected brand in the current airconditioning market that delivers innovation and reliability, guaranteeing that the device will last for more than 15 years.

Rheem is an ideal choice if you’re looking for a long-term investment.

Are Rheem Airconditioners Any Good?

Yes, Rheem is good airconditioner, built on a foundation as one of the giants in the current appliance market, where many people opt for a Rheem AC whenever they move to a new home.

However, you must consider that Rheem air conditioners can be prone to breakage and might need consistent service by a professional.

If you want to save the hassle of finding your AC broken down every few days, it is best to avoid Rheem and opt for a more robust brand such as Miele or Samsung.

What Do The Reviews Say?

I had a Rheem air conditioner 2 ton 16 SEER installed, but very unhappy.

It runs every 8 minutes, and the air never feels crisp, only humid.

I’m worried about mold and the higher electric bill since it runs so much. I wouldn’t have done this had I known about the new Rheem appliances.


The Heat Pump and Air Handler are working perfectly after several years.

Hushed operation compared to the previous unit—best of all, Incredible Savings on Utility Usage and Bills, both summer and winter.


Mine is about ten years old, and it is okay. Except for last season, I haven’t had a problem; it needed Freon. Greg Hookenshoven Heating and Air Conditioning installed mine.

Excellent service and he quickly responds when called for assistance. I can’t say enough.


Pros and Cons of Rheem Airconditioners

Here are some of the pros and cons of Rheem Airconditioners


  • Aluminium evaporators and condenser coils
  • Affordable appliances
  • A practical design that fits your kitchen


  • Coil leaks are persistent
  • The evaporator coil is difficult to clean
  • Lack of customer support


Rheem air conditioners are a popular choice among many international markets and people opt for this brand whenever they need an affordable appliance with valuable features and extended reliability.

If you’ve read this article, you are not well equipped to deal with any problem regarding your Rheem air conditioners.

Ensure that you follow the given details carefully and call a technician if the repair process seems too hectic. Good luck!



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