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How To Fix Error E5 on Your Air Conditioner

Air Conditioning On The Wall In The House

If you’re an air conditioner owner, you know one of the most frustrating things is when your AC unit starts to act up.

But don’t worry – if your unit displays an E5 error code, you don’t have to call for a repair service immediately; it’s a common problem that can be easily resolved!

This guide will teach you how to troubleshoot and diagnose the E5 error code on your air conditioner.

We’ll also provide some tips on preventative maintenance so you can stay on top of your AC unit’s upkeep and avoid future errors.


You can take a few simple steps to help prevent your unit from displaying the E5 error code.

First, remember to clean or replace your air filter every month. You should also regularly check the water collection tray and drain pipe for blockages.

Secondly, inspect the evaporator coils and thermostat connections to ensure they are secure and corrosion-free.

Lastly, ensure that the AC unit has adequate ventilation and that the refrigerant levels are topped off if necessary.

Keep reading to get your air conditioner working again! With our easy-to-follow instructions, your AC will soon run smoothly again.

What Is E5 Error Code?

Wooden Cubes With The Letters “Error” Are Lying On A Laptop

The E5 error code indicates that the indoor unit has overheated due to a blockage in the water collection tank. The water collection tank (also known as the drip tray) collects any condensation the air conditioner produces.

If it becomes blocked, the condensation won’t be able to evaporate and will cause the unit to overheat.

How To Fix Error E5?

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You’ll need to empty the water collection tank and clean it to fix this error. You’ll need to turn off your AC unit and unplug it from the power. Then, locate the water collection tray and carefully remove it.

Empty the tray and clean it with a soft cloth. Once you have cleaned the tank, reattach it to the unit and plug it back in.

After you have finished this step, check the display again. If you still see an E5 error code, don’t panic! Follow these steps to diagnose and troubleshoot the issue.

Check Your Filter

Changing The Filter Of The Air Conditioner. Changing Filter In Air Conditioning

If the E5 error code is still present, it may be due to a dirty air filter. Failing to replace your air filter regularly can cause it to become clogged and reduce the efficiency of your AC unit.

To address this issue, power off your unit and remove the filter. Wash it with some warm water and use a soft-bristled brush to gently brush away dirt and debris, then leave it to air dry before replacing it in the unit.

Note: If it appears very dirty or clogged with dust and debris, replace the filter with a new one.

Check Your Drain Pipe

Ac Condensate Drain Pipe On The Floor

Next, check if there is any blockage in the drain pipe. If a blockage is present, clear it out and ensure the pipe is free from obstructions.

The drain pipe prevents condensation from building up within the air conditioner, so if it is blocked, it can cause the E5 error code to appear.

Check Your Thermostat

A Person Cooling Down Home Air Conditioning, And The Temperature Is On Centigrade Celsius Metrics Using A Nest Smart Thermostat On A White Wall

A faulty thermostat can also cause an E5 error code to display. Turn your AC unit off to inspect the thermostat and remove the cover.

Check the connections on the thermostat to ensure they are secure and free of corrosion. If all looks good, try turning your AC back on and see if the error code is still displayed.

Frozen Evaporator Coils

Air Condition Unit Refrigerant Fluid Leaking With With White Fome Freon Chemical

If your evaporator coils are frozen, it can cause the E5 error code to appear. To check if this is the case, inspect the coils to see any visible frost. If so, turn off the unit and let it thaw before using it again.

Check for Adequate Ventilation

Condenser Unit Or Compressor Outside Home Or Residential Building

If your AC unit doesn’t have enough ventilation, it won’t be able to work efficiently. Ensure the vents are free of obstructions and that there is enough space around your AC unit for airflow.

Refrigerant Leak

Air Repair Mechanic Using Measuring Equipment For Filling Industrial Factory Air Conditioners And Checking Maintenance Outdoor Air Compressor Unit

If your AC unit is leaking refrigerant, it can cause the evaporator coils to freeze and result in an E5 error code. Inspect the unit for any visible signs of leaking fluid or cracks in the hoses to check for a refrigerant leak.

Note: If you spot any, turn off your AC and contact a professional repair service immediately.

  • Never attempt to repair a refrigerant leak on your own, as it can be dangerous and requires special tools and experience.
  • Always ensure that you have turned off your AC unit and unplugged it from power before attempting any repairs.
  • Read the owner’s manual before making repairs or adjustments to your AC unit.
  • Contact a professional repair service immediately if you cannot troubleshoot the error code.


By following these steps, you can ensure that your AC unit continues to work properly and reduce the chances of displaying the E5 error code.

With the proper maintenance and troubleshooting, you should be able to confidently enjoy your air conditioner’s cool air on a hot summer day.

Frequently Asked Questions

Can I Use Vinegar To Unclog My AC Drain Line?

Vinegar can be an effective and non-toxic way to unclog the drain line; however, vinegar may not be enough to clear it if you’re dealing with a deep clog.

Is It Safe To Use Bleach in My AC Drain Line?

Yes, using a bleach solution can help clear out any blockages in the drain line; however, it should not be poured directly into the line as it can cause corrosion.

Instead, you should use a bleach-water solution and pour it into the drain line.

Can I Use Boiling Water To Clean My AC Filter?

No, boiling water can damage the filter and cause it to break down prematurely. Instead, use a slightly warm water or vacuum cleaner attachment to gently remove dust and debris from the filter.

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