How long to wait to restart an air conditioner?

Author: Joesph Schultz  |  Last update: Wednesday, December 10, 2025

After you've turned off the circuit breaker, you'll want to switch it back to “on.” Wait 30 minutes. Give your air conditioner some time to reset after you turn it on. The internal circuitry can take around 30 minutes to get back up and running, so wait half an hour before moving to the next step.

How long to wait before restarting AC?

Depending on the system, an optimal time of 3 minutes is required before switching the system on. If the system is turned on without waiting for at least 3 minutes, the system can start with a pressure load. This pressure load prevents the system from cooling properly, which could affect the system in the long run.

What is the 3 minute rule for air conditioners?

The cardinal rule involves giving your unit a 3-minute break post activation or deactivation. Such a brief pause assists in keeping its functionality at an optimum level. Resetting the circuit breaker around 24 hours before the air conditioner's first summer use is a tactic often overlooked.

How long should I leave my AC off to reset it?

After finding the circuit breaker for your AC unit, flip it to the off position. Leave it off for around 30 minutes, then flip it back to the on position. If you have fuses, you can only reset the AC by taking the fuse out.

How long to wait before turning on air conditioner after service?

Several components, such as the condensate and refrigerant, also restart when an air conditioning system does. Depending on the system, it is best to wait three minutes before turning it on. The system may start with a pressure load if it is turned on without waiting for at least three minutes.

How to Reboot and Reset Your Air Conditioner

How long should AC stay off before turning back on?

The system will often complete a full cycle every 15 to 20 minutes, then turn off for up to 10 minutes before turning back on. Following this process, the system should turn on and off about three times every hour. Is your system doing more than that? Perhaps it is doing so less often than you think it should.

How long does an AC have to sit before turning on?

It is recommended to let a portable air conditioner sit upright for at least 24 hours before turning it on to allow the refrigerant to settle properly and prevent potential damage to the compressor.

How long does an AC need to rest?

Once the AC completes a cycle of about 15 and 20 minutes, it should remain off for 7 to 10 minutes. This helps it cool off before starting another cycle. The stops happen 2 to three times per hour.

How long to wait to turn on AC after resetting breaker?

Reset Your AC's Tripped Breaker

After doing this, you can turn the switch back to the “on” position. Even though you've reset the AC at the breaker box, it doesn't mean it will start working immediately. Many systems need about 30 minutes to reset the internal circuitry before you can turn it back on at the thermostat.

Why does my AC say wait 3 minutes before restarting?

This is a short cycle protection. Something has happened, usually a power outage and this is a protection for your unit to not turn on and short cycle before all the pressures have been equalized. Wait 3-5 minutes for your air conditioner to be ready to turn on again.

How long should an AC compressor run before shutting off?

When things are working right, your central air conditioner should run for 15 to 20 minutes and then turn off for a few minutes. It will do this two or three times every hour. It may run longer when it's sweltering outside.

Does turning AC on and off break it?

Wear and Tear on the System

Turning your air conditioner completely off and then on forces the system to work harder. Each time the air conditioner starts, it experiences a surge of power, which can strain the components. Over time, this can lead to a breakdown or the need for premature repairs.

What is the new law for air conditioners?

The New Regulations

Starting January 1, 2025, all new residential air conditioners and heat pumps must utilize A2L refrigerants. Older refrigerants like R-410, which are likely the refrigerant used by your current system, are being phased out.

Do you have to wait 24 hours to turn on air conditioner?

Installing a new air conditioner is exciting, but you must allow it to settle before turning it on. Although an air conditioner can be set in as little as 30 minutes, this is not always the case. The freon in an AC can settle in 22 minutes on average, but it can take up to 24 hours in some cases.

Does restarting AC help?

While it won't fix some mechanical problems, a quick AC reset is the first step in troubleshooting common AC issues. Whether your air conditioner stopped running or is experiencing recurring issues, here's how to troubleshoot air conditioner problems with a good old-fashioned reset.

Will an AC freeze up if it runs too long?

If the thermostat malfunctions and detects the wrong temperature, this can cause your A/C to run too hard for long periods of time. If your A/C runs for too long it can cause the coils to freeze.

How long to wait before turning AC back on?

Reset it ideally 24 hours before turning on your air conditioning after the winter. However, if there's a problem with the circuit board or you're not sure which breaker controls the outdoor unit, contact a HVAC professional.

How long to leave air conditioner off before restarting?

Once you locate the isolator, you may turn it off and wait for 30 minutes. The time allows for the appliance to dispel electrostatic charge. After half an hour, you can turn the lever your AC should restart without a problem. Once your AC is on, test it to determine if it's working.

Why is AC not blowing cold air?

First, check your filters and coils for dirt and debris that may be impeding airflow. Once you've cleaned the filters and coils, run the air conditioner with just the fan so that the ice accumulation can melt off. If the AC still doesn't blow cold air, it could be that refrigerant levels are too low.

Should you give air conditioners a break?

Your AC unit doesn't need to rest during the sweltering summer heat. Air conditioners are designed to operate continuously for extended periods, especially during summer when the heat is at its peak. In fact, shutting your AC unit off for extended periods could actually hurt your unit in the long run.

How long does it take for freon to settle in an air conditioner?

Freon settles in an air conditioner in a matter of minutes. Though, it depends on the type of air conditioner too. If the air conditioner is portable, it takes about 5-30 minutes for the Freon to settle. This time must be dedicated to the appliance for it to function properly.

Is it OK to leave my AC on all night?

Is it safe to leave the air conditioner on all night? It is safe! However, it can lead to greater expenses associated with energy usage. Ask our team at Comfort Specialists about energy-saving solutions today!

How long should you let an AC rest?

Giving your air conditioner a 15 to 30-minute break every 2 to 3 hours of uninterrupted functioning can be beneficial. The system can cool down, and its parts can rest during this time, reducing the stress on the unit.

How long does it take for AC to turn on after reset?

The internal circuitry can take around 30 minutes to get back up and running, so wait half an hour before moving to the next step. Turn the thermostat back on.

How long does a compressor need to be upright before use?

If transported on its side, turn it upright and let it stand for at least four hours.

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