Rheem Air Conditioner Blowing Hot Air – 8 Solution
In hot weather, you depend on your air conditioner to provide a cool and comfortable home. But if your Rheem AC starts blowing hot air instead of cold, it’s frustrating and uncomfortable.
In this guide, we’ll explore the causes of this issue and provide troubleshooting steps to fix it.
So you can keep enjoying the cool air of your Rheem AC unit.
Why Does Rheem Air Conditioner Blowing Hot Air?
During a hot summer day, it’s awful when your air conditioner blows hot air instead of cool.
There are multiple reasons why your Rheem AC may blow hot air, most of which can be easily fixed.
Common causes for this issue include incorrect thermostat settings, dirty air filters, refrigerant leakage, electrical problems, duct leakage, malfunctioning air handlers, frozen evaporator coils, and damaged components.
Each problem below is solved step-by-step.
Thermostat Setting
To troubleshoot when your Rheem air conditioner is blowing hot air, check the thermostat setting. It might be accidentally set to heat instead of cool, causing the AC to blow hot air.
How To Fix?
To fix this issue, follow these steps:
1. Check the thermostat display to ensure it is set to cool mode.
2. If the thermostat is set to heat, switch it to cool mode.
3. Adjust the temperature setting to a lower temperature than the current room temperature.
4. Wait a few minutes for the air conditioner to start blowing cool air.
5. Verify that the air coming out of the vents is now cool.
Air Filter
A dirty air filter can restrict airflow and cause the air conditioner to blow hot air. When the air filter becomes clogged with dust and debris, it hinders the system’s ability to cool the air effectively.
How To Fix?
Follow these steps to clean or replace the air filter:
1. Locate the air filter, usually found in the return air duct or inside the air handler unit.
2. Turn off the air conditioner to prevent any debris from being drawn into the system.
3. Remove the air filter from its housing.
4. If the filter is washable, gently rinse it with water and mild detergent. Allow it to dry completely before reinstalling.
5. If the filter is disposable, replace it with a new one of the same size and type.
6. Reinstall the filter, ensuring it is properly seated and positioned according to the arrows or markings.
7. Turn on the air conditioner and check if the airflow has improved and the air is now cool.
Refrigerant Leakage
Refrigerant leakage can cause your Rheem air conditioner to blow hot air. Low refrigerant levels prevent the system from properly cooling the air, resulting in warm airflow.
How To Fix?
Fixing a refrigerant leakage requires professional assistance as it involves handling refrigerant and repairing the leak.
Follow these steps:
1. Contact a qualified HVAC technician to inspect the system and locate the refrigerant leak.
2. The technician will repair the leak and ensure the system is sealed properly.
3. Once the leak is fixed, the technician will recharge the system with the appropriate amount of refrigerant.
4. After the recharge, the technician will test the system to ensure it is functioning correctly and blowing cool air.
Electrical Issues
Electrical issues can also cause a RheemAC to blow hot air. Problems with the electrical connections or components can disrupt the cooling process and result in warm airflow.
How To Fix?
Here’s a step-by-step guide to addressing electrical issues:
1. Check the power supply to the air conditioner. Ensure that it is receiving electricity and that the circuit breaker or fuse is not tripped or blown.
2. Inspect the wiring and connections for any signs of damage or loose connections. If you’re unfamiliar with electrical work, it’s best to contact a professional for assistance.
3. If you find any damaged wires or loose connections, have them repaired by a qualified electrician.
4. Reset the circuit breaker or replace the blown fuse if necessary.
5. Turn on the air conditioner and check if it is now blowing cool air. If the problem persists, seek professional help to diagnose and resolve the electrical issue.
Duct Leakage
Duct leakage can cause the cool air produced by your Rheem air conditioner to escape before it reaches the desired areas of your home. This can result in reduced cooling efficiency and hot air blowing from the vents.
How To Fix?
Follow these steps to address duct leakage:
1. Inspect the ductwork for any visible signs of leakage, such as disconnected or damaged sections.
2. Seal any visible leaks using duct tape or mastic sealant. Ensure a secure and airtight seal.
3. Pay close attention to joints, connections, and areas where the ductwork may have come loose.
4. Consider hiring a professional duct cleaning and sealing service to thoroughly inspect and seal the ductwork throughout your home.
5. Once the ducts are properly sealed, turn on the air conditioner and check if the airflow is improved and the air is now cool.
Air Handler Problems
Issues with the air handler can also lead to hot air blowing from your Rheem air conditioner. Problems with the blower motor, fan, or other components can prevent the proper circulation of cool air.
How To Fix?
To address air handler problems, follow these steps:
1. Check the air handler unit for any visible signs of damage, such as loose or broken components.
2. Ensure that the blower motor is operating correctly. If it is not running, consult a professional technician for further inspection and repairs.
3. Inspect the fan blades for any debris or obstructions that may impede their movement. Clean the blades carefully if necessary.
4. Lubricate the fan motor and bearings according to the manufacturer’s instructions.
5. Verify that the air handler’s filters and coils are clean and free from dirt or debris. Clean or replace them if needed.
6. Turn on the air conditioner and check if the air handler is now functioning properly, providing cool air.
Frozen Evaporator Coil
A frozen evaporator coil can disrupt the cooling process and cause the Rheem air conditioner to blow hot air. This issue is often caused by restricted airflow or a malfunctioning component.
How To Fix?
Follow these steps to address a frozen evaporator coil:
1. Turn off the air conditioner to allow the coil to thaw. This may take several hours.
2. Check the air filter and ensure it is clean and not obstructing airflow. Clean or replace the filter if necessary.
3. Inspect the evaporator coil for any visible signs of dirt or debris. Clean the coil carefully using a soft brush or vacuum cleaner.
4. Examine the blower motor and fan for any issues. If the motor is not running or the fan is not functioning properly, consult a professional for repairs.
5. Once the coil is clean and the airflow is unrestricted, turn on the air conditioner and check if it is blowing cool air.
6. If the problem persists, contact a professional technician to diagnose further and resolve the issue.
Damaged or Malfunctioning Components
Damaged or malfunctioning components within the Rheem air conditioner can also result in hot air blowing from the unit. Faulty parts, such as the compressor or condenser fan, can disrupt the cooling process.
How To Fix?
Here’s a step-by-step guide to address damaged or malfunctioning components:
1. Turn off the air conditioner and ensure it is disconnected from the power source.
2. Inspect the various components of the air conditioner, such as the compressor, condenser fan, and other relevant parts, for any visible signs of damage or malfunction.
3. If you identify any damaged or faulty components, it is best to contact a professional HVAC technician to replace or repair them.
4. Avoid attempting to repair or replace these components yourself, as it requires specialised knowledge and tools.
5. Once the damaged or malfunctioning components have been repaired or replaced, turn on the air conditioner and check if it is now blowing cool air.
Rheem air conditioner maintenance Guide
Regular maintenance is crucial to ensure the proper functioning and longevity of your Rheem air conditioner. Here are some essential maintenance tips to keep in mind:
- Change or clean the air filters every 1-3 months, depending on usage. Clogged filters can restrict airflow and decrease cooling efficiency.
- Inspect and clean the condenser coils annually to prevent dirt and debris buildup that can hinder performance.
- Check the refrigerant levels regularly. Low levels can indicate a leak or other issues that require professional attention.
- Keep the area around the outdoor unit free from debris, such as leaves and branches, to ensure proper airflow.
- Schedule annual maintenance appointments with a professional HVAC technician to inspect and service your Rheem air conditioner. They can identify and address any potential issues before they become major problems.
If you notice anything out of the ordinary, contact a professional technician to diagnose and resolve the issue promptly.
Conclusion
In this troubleshooting guide, we have explored common issues that can cause a Rheem air conditioner to blow hot air.
From thermostat settings to damaged components, these problems can often be resolved with the appropriate steps.
Remember to perform regular maintenance and cleanings to prevent future issues and ensure optimal cooling performance from your Rheem air conditioner.
