Why Window Air Conditioner All Lights Flashing and Beeping

What can possibly be more annoying (and terrifying) than a constantly flashing and beeping air conditioner? Is there a way to quickly fix the issue and get on with your day?

In case all the lights are flashing on your window AC and the unit is also constantly beeping, there’s a good chance that an electrical component is faulty. It could be the control board, capacitor, fan motor, or compressor, so calling an expert is the best solution.

Window Air Conditioner All Lights Flashing and Beeping

It is normal for an air conditioner to beep and have all the lights turned on for a few seconds when the power cord gets connected to the unit and when there is a power interruption.

However, if the window air conditioner keeps flashing and beeping for longer, then the chances are high that there is an internal issue. It is better to let a professional take care of the problem as it might be an issue with one of the electrical components (the control board, fan motor, compressor, or capacitor).

While you’re waiting for the serviceman to come over, you might want to turn the unit off.

Read: Why Window Air Conditioner Compressor Not Turning On?

Why Is My Window Air Conditioner Beeping?

The beeping sound can mean quite a few things:

  • The remote control’s batteries are running low
  • There is insufficient airflow
  • It’s time to replace the air filter
  • The power is out
  • The system’s sensor is faulty
  • There is excess condensation in the HVAC system

Why Is My Window AC Light Blinking?

  • Poor air circulation
  • A refrigerant leak
  • A clogged air filter
  • A frozen evaporator coil
  • The unit needs to undergo regular servicing
  • Incorrect installation
  • An electrical fault

Why Is My GE Air Conditioner Filter Light Blinking?

Window air conditioners that have a Reset Filter pad also have an LED indicator light that will remind you when the filter needs to be changed

In GE air cons, the light will turn on once the fan has been running for 250 hours in total

All you would have to do is clean the filter or replace it and then press the Reset Filter pad. The LED light will turn off and the timer will be reset. 

Read: Does A Window Air Conditioner Need A Dedicated Circuit?

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Why Is My GE Window Air Conditioner Beeping?

When you hear your air con beep or see the lights blink, make sure to pay attention to the error code displayed on the actual unit – it might help you identify the problem. 

Do bear in mind that, in some cases, the beeping sound produced by your GE unit is completely normal. The unit will beep once when:

  • The power cord has just been connected
  • There is a power interruption
  • A button gets pressed while the power is on

The air conditioner will beep twice if a button press failed.

Read: Does A Window Air Conditioner Pull Air From Outside?

What Does a Red Flashing Light Mean on an Air Conditioner?

When the air con gets turned on, the red indicator might start blinking; in a few minutes, the light should become solid. If your unit is working perfectly fine, then it looks like your model simply uses a red light to indicate that the cooling unit is on.

In the rest of the cases, a blinking red light can indicate a technical malfunction. You can try replacing the filter, but if that doesn’t help, then it might be a good idea to consult an HVAC technician. 

What Does It Mean When the AC Light Blinks 3 Times?

In an LG cooling unit, 3 flashes can mean one of the following:

  • DC link voltage is too low
  • Current to the current thermistor is too low
  • Inverter compressor discharge pipe temperature is too high
  • Condenser coil pipe thermistor temperature is too low

Read: How To Prevent Mold In Window Air Conditioner?

How Do I Stop My AC Light from Blinking?

  1. Give the unit a couple of minutes – the light might stop blinking on its own.
  2. Check the breaker – if it had tripped, then flip it back. Replace a blown fuse, if there is one.
  3. Reset the unit at the breaker.
  4. Check the wiring for any loose connections.
  5. If your remote has a ‘test’ button, use it to determine the error code. Then, consult the owner’s manual.
  6. A blinking light might indicate a problem with the circuit board or the refrigerant level. In such a case, you would have to call a professional.

Do All AC Units Have a Reset Button?

The majority of cooling units have a reset button. You can consult the owner’s manual to find out where the button on your unit is located. 

Where Is the AC Reset Button?

A window air con can have a reset button on the unit’s control panel

The air conditioners that don’t have such a button, can be reset by simply unplugging the unit and plugging it back in. 

How Do I Reset My Window Air Conditioner?

At times, all you would have to do is turn the unit off, wait for around 5 minutes, and then turn it on again. 

You can also try unplugging the air conditioner, waiting for 5 minutes, and then plugging it back in.

How Do I Reset My GE Window Air Conditioner?

Most GE units have a large reset button right on the air conditioner’s power cord plug (you’ll find it next to the ‘test’ button).

Simply locate the button, keep pushing it for about 5 seconds, and then turn the AC on. 

Read: Why Are HVAC Vents Under Windows?

What Is Choking in AC?

Your air conditioning unit can start to ‘choke’ if the airflow is restricted. A dirty air filter and a dirty or blocked unit might be to blame. 

The evaporator coil can become ‘choked off’ if there is a lack of warm air traveling across it (the coil will simply freeze).

Another thing that can make your air conditioner suffer is a restricted capillary tube. This will cause the unit to operate at a lower than normal suction pressure. 

What Is the Size of Capillary Tube?

Capillary tubes are the elements that meter and restrict the flow of the refrigerant to the evaporator. Its main job is to maintain the pressure difference needed for the system’s operation.

The internal diameter of these tubes usually varies from 0.02 to 0.09 inches.

Why Does My Window Air Conditioner Turn Off by Itself?

If your air con turns off, it might be part of its normal operation. Once the unit manages to get your house to the desired temperature, the thermostat will shut it down.

If that happens way too quickly, then your AC might be a bit big for your house.

The air conditioner might also be turning off because:

  • The compressor is overheating (a clogged filter or a dirty unit can be the root cause of the problem)
  • There is a refrigerant leak
  • The AC and/or thermostat settings are incorrect

How Much Does It Cost to Put Freon in a Window Unit?

Depending on the type and size of the unit that you have, you can expect to pay anywhere between $100 and $350 for a refill.

Can You Put Freon in a Window AC?

The air conditioning units manufactured after the year 2010, no longer use Freon. The majority of systems rely on R410A nowadays. 

As of January 1, 2020, Freon can no longer be imported into or made in the US.

How Do I Know If My Window Air Conditioner Is Low on Freon?

  1. Measure the temperature of the air con’s airflow.
  2. Measure the room’s temperature.
  3. Calculate the temperature difference. If it’s higher than 20 F, then you should simply clean the filter; if it’s between 10 and 20 F, you need a refill.

Warning! In case the temperature difference is lower than 10 F, you might have a serious refrigerant leak.

How Many Years Does a Window Air Conditioner Last?

In general, window ACs last about 8-10 years. Some models can last for up to 25 years if you manage to take good care of them.