Air conditioner starts then stops after only a few seconds

Air conditioner starts then stops after only a few seconds. Are you facing the problem of repeatedly turning on and off your window AC? Is your AC on, and doesn’t it give out much cold air?

The window air conditioner is perhaps most possibly due to the short cycling as it continually goes on and off.

Due to filthy, damaged, or malfunctioning components and for a variety of other electrical or mechanical causes, a window AC system might switch on and off frequently.

Air conditioner starts then stops after only a few secondsair conditioner starts then stops after only a few seconds how to fix

The phrase “short cycling” describes when a window air conditioner’s conditioning cycle is interrupted and then restarted after just a brief period.

This might imply that the system goes on and off every 10 to 15 minutes, depending on outdoor and indoor circumstances.

So, what might be the actual reason that makes the window air conditioner turns on and off repeatedly?

For the answer, read the article till the end.

So, here you go!

Many common issues might be the reason for the window air conditioner turning on and off repeatedly, so let’s take a look at them.

Thermostat problemair conditioner thermostat problem

The issue might be as simple as the thermostat triggering short cycling; therefore, examine your thermostat if the AC system starts short cycling.

Whereas the thermostat might appear to be a small aspect of the unit, it really is critical that this really works correctly as it regulates the temperature of an entire room.

If a thermostat does not correctly sense the temperature and sends inaccurate info, the window cooling system will often start or stop.

If a display on the thermostat is dark or dim, the battery may be low as well as the thermostat gets weaker occasionally.

If your thermostat loses the battery’s power, it will allow the window air conditioner to switch on and off.

Bad Air filterwindow air conditioner bad air filter

One of the most prevalent reasons for window AC difficulties is dirty air filters.

A clogged air filter reduces air circulation to a window air conditioner and, therefore, can result in a variety of issues, like short cycling.

Refrigerant Issue

Your device’s refrigerant supplies could be too low as this coolant is necessary for absorbing the heat and conditioning air.

Whenever there is not enough coolant, the compressor’s levels of pressure become unpredictable, forcing it to cycle on and off as it can pose a serious threat to the system.

Electrical issueselectrical issues

There are some spots wherein electrical problems might lead the window air conditioner to cycle on and off.

Checking connections may be dangerous and difficult for inexperienced persons, even if they have the necessary expertise and equipment.

Run Capacitor Issuewindow air conditioner run capacitor

The running capacitor in the window air conditioner produces a burst of energy to switch on the unit and then supplies constant power to maintain it while running.

If the run capacitor wears out, it will stop supplying electricity constantly, causing the window air conditioner to cycle on and off.

So, what’s the solution for fixing these issues?

If you are not sure about what’s wrong with your window AC, it’s better to contact the local mechanic to resolve any issue regarding your window air conditioner or call the customer service center to fix any issue with your window AC.

How to manage the window air conditioner?

If the window AC shows some issues while turning on and off, then you should first clean your window AC for better outcomes.

  • Firstly, disconnect the power cord first from the window air conditioner.
  • Uninstall the whole front cover plate, which holds the device together.
  • Remove the air purifier from the window air conditioner.
  • Refresh the air purifier inside the device that screens the airflow that enters it.
  • Now, wash up dirt and particles from the front cover.
  • Wash the coils to remove any dust, sediment, or grime.
  • Thoroughly clean around the compressor to remove any waste, debris, or pollen.
  • Then, wipe any dirt, dust, or waste from the fan.
  • Put the air quality filters in your window air conditioner.
  • Reattach the front cover.
  • Lastly, connect the window air conditioner and then check to see whether it is working.


So, we’ve mentioned the five major reasons why the window air conditioner turns on and off repeatedly, as any one of these problems must be resolved by a professional.

Undoubtedly, many of you could have the expertise to resolve the issue on your own, but it would be better to leave the technical aspects to the professionals.

Their knowledge would ensure once they’ve fixed the problem, it won’t recur again for a long time.

Air conditioner starts then stops after only a few seconds (How to fix)

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