Reset Your AC Unit Like a Pro: Master the Art of AC Revival

Hand using remote to turn off air conditioner.

Gaining proficiency in resetting your air conditioning (AC) unit is key to ensuring a consistently comfortable home environment. This skill becomes particularly useful when resolving minor technical issues or restoring functionality after a power outage. A well-executed reset not only maintains comfort but also prevents extended downtime. Understanding the appropriate situations for a reset is crucial for the efficient operation of your AC, helping to avoid unnecessary costs and inefficiencies. This comprehensive guide is designed to provide you with foundational knowledge, tackle common errors, and deliver tailored instructions for various AC brands.

Understanding the Need

Performance Issues

Resetting your AC unit is necessary when it has performance issues, such as insufficient cooling since it is one of the main reasons to do so. If your air conditioning system is not properly cooling, it may be required to perform a reset in order to address any underlying issues. Below are a few typical indicators of performance problems that may justify a reset:

  • Reduced cooling capacity;
  • Uneven cooling in different rooms;
  • Longer cooling cycles;
  • Inefficient energy consumption.

A reset can help refresh the AC’s settings and resolve minor glitches that affect its performance.

After a Power Outage

Power outages can disrupt your AC unit’s operation and require a reset to get it running smoothly again. When the power is restored after an outage, the sudden surge can affect the AC’s internal settings, necessitating a reset. This is especially crucial during hot summer months when reliable cooling is essential.

Error Codes

Modern AC units are equipped with advanced diagnostics systems that display error codes when issues arise. These error codes can indicate problems with components or system malfunctions. Sometimes, a simple reset is all it takes to clear these error codes and restore normal operation.

Common Misconceptions About Resetting AC Units

“Resetting Fixes All Problems”

A common misconception is that resetting your AC unit can resolve all issues. While resetting can address certain issues related to settings and errors, it doesn’t fix mechanical or structural problems within the unit. It’s essential to differentiate between issues that can be solved with a reset and those that require professional maintenance or repairs.

“Frequent Resets are Normal”

Consistently needing to reset your AC unit is not normal and should not be accepted as routine. Frequent resets are indicative of deeper underlying problems that need to be investigated and addressed promptly. Relying on frequent resets can lead to increased energy consumption and reduced AC lifespan.

“Resetting is Complex”

Most modern air conditioners have intuitive control panels that make restarting the system a breeze. Instructions on how to reset the device can be found in the user manual provided by the manufacturer. If you want to make sure you’re using your AC correctly, reading the manual for your individual model is a must.

Common Mistakes When Resetting AC Units

Ignoring Safety

Ensuring safety is a crucial factor when resetting your AC unit. Prior to initiating a reset, it is imperative to consistently deactivate the power supply. This measure serves to mitigate electrical mishaps and guarantees your well-being throughout the procedure.

Rushing the Process

Following the deactivation of the power supply, it is crucial to allow your air conditioning machine to rest for a few while before attempting to reset it. Expediting the procedure may hinder the unit’s ability to fully release any remaining electrical energy, which could lead to potential harm or inaccuracies in the reset.

Overlooking the Manual

Various AC models may possess distinct reset procedures. It is imperative to consult the manufacturer’s user manual for your particular model in order to adhere to the appropriate procedures. Failure to consult the instructions can result in erroneous reset attempts or potential harm to the device.

Step-by-Step Guide: How to Reset Your AC Unit Properly

Step 1: Power Off Your AC Unit

The first and most crucial step in resetting your AC unit involves completely turning off the power. This step is essential for both safety and the effectiveness of the reset process.

  • Thermostat: Begin by turning off your AC at the thermostat. This is your initial action and it’s important because it stops the unit from actively cooling or heating, preparing it for the reset;
  • Main Power Source: After ensuring the thermostat is off, proceed to disconnect the AC unit from its main power source. This step is crucial as it ensures that the unit is completely powered down and safe to handle, preventing any electrical hazards.

Step 2: Wait for the Internal Reset

After powering off the unit, the next step is a crucial waiting period, allowing the unit’s internal system to reset.

  • Duration: Allow the unit to sit idle for approximately 15 to 30 minutes. This waiting period is critical for the internal components of the AC unit to reset effectively;
  • Importance: The purpose of this waiting period is to allow the unit’s internal circuits to fully discharge and reset. This step is vital for the AC’s proper functioning post-reset, as it ensures any temporary glitches or errors in the system are cleared.

Step 3: Power On the AC Unit

Once you have waited for the necessary period, the next step is to power the unit back on.

  • Reconnect Main Power: Carefully reconnect your AC unit to its main power source. This step marks the beginning of the restarting process for the unit;
  • Thermostat Power On: Subsequently, turn the AC unit back on at the thermostat. This action signals the AC unit to start its normal operation cycle, and it’s an important step to gauge whether the reset has been effective.

Step 4: Check the AC Unit Operation

The final step involves carefully observing the AC unit to ensure it operates correctly.

  • Observation: After the AC unit is powered on, closely observe its operation. Listen for any unusual noises, check for effective cooling or heating, and monitor for any signs of malfunction. These could include strange sounds, failure to reach the set temperature, or unusual delays in start-up;
  • Normal Operation: If the AC unit resumes normal operation, with efficient cooling or heating and no odd sounds, the reset has been successful. This indicates that any minor glitches or system errors have been resolved through the reset process.

Top Aircon Brands and How to Reset Them

Carrier Air Conditioners

Carrier is a well-known brand with a reputation for providing reliable cooling solutions. To reset a Carrier air conditioner, follow these steps:

  • Reset Method: Locate the reset button on the outdoor unit of your Carrier air conditioner. Press and hold this button for approximately 3 seconds before releasing it;
  • Applicable Models: This reset method is applicable to most Carrier models, ensuring that it covers a wide range of residential and commercial units.

LG Air Conditioners

LG is another renowned brand that offers a diverse range of residential air conditioning units. To reset an LG air conditioner, follow these steps:

  • Reset Method: Begin by turning off the unit using the thermostat. Next, unplug the air conditioner from its power source. Wait for about a minute to ensure that all residual power is discharged. Then, plug the unit back in and restart it;
  • Applicable Models: This reset method is common across LG’s residential air conditioning units, making it a valuable skill for LG air conditioner owners.

Daikin Air Conditioners

Daikin is known for its energy-efficient and reliable air conditioning systems. To reset a Daikin air conditioner, follow these steps

  • Reset Method: For most Daikin air conditioner models, the reset can be accomplished by turning off the power at the circuit breaker that supplies electricity to the unit. After turning off the power, wait for approximately one minute, and then turn the circuit breaker back on;
  • Applicable Models: This reset method is widely applicable across various Daikin air conditioner models, ensuring versatility and ease of use.

Samsung Air Conditioners

Samsung offers a wide variety of air conditioning models, each with its unique features and reset procedures. To reset a Samsung air conditioner, follow these general guidelines:

  • Reset Method: The remote control for most Samsung air conditioners includes a reset button. The remote can be reset by pressing and holding the power button for around 5 seconds. The settings menu of your Samsung model may also provide a factory reset option;
  • Applicable Models: The reset method for Samsung air conditioners may vary depending on the specific model you own. To ensure accuracy, refer to the user manual that came with your unit for model-specific reset instructions.


Understanding how to reset your AC unit is a valuable skill for any homeowner. While resetting can resolve minor issues, it’s important to recognize when professional help is needed. Remember, regular maintenance is key to avoiding frequent resets and ensuring the longevity of your AC unit.


Q: How often should I reset my AC?

A: Reset only when necessary, such as after power outages or when facing performance issues.

Q: Can resetting my AC unit harm it?

A: No, if done correctly, it’s a safe process.

Q: What should I do if resetting doesn’t fix the issue?

A: Consult a professional technician for further diagnosis and repair.

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