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How to fix E1 error code?

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  • 3 min read

Air conditioners have come a long way and are now essential to our homes. That said, as advanced as they’ve become, they still aren’t perfect and random errors or breakdowns are nothing new. 

In this article, we’re looking at the E1 error code in your air conditioner, its causes and what you can do to fix the problem.


What causes this error?

The E1 is one of the most common error codes you’ll see on an air conditioner. It’s more of a reminder rather than an error in the sense that it’s a warning to clean your unit’s air filter. These error codes generally appear after a certain number of hours of operation. 

Other common reasons include the following:

  • Moisture or dirt accumulation in the front control panel.
  • Defective or non-functioning thermistor.
  • Mechanical fault in the unit. 
  • Indoor and outdoor units can’t communicate properly. 

Also read: What is HVAC?


How to fix this?

Here are five fixes you can try out. 

Clean the air filter

The first thing you should do is clean the air filter on your unit. As mentioned before, these errors usually show up after a predetermined period of operational hours. Cleaning out your filter should get the error resolved rather easily. 


Check the front button panel

Another common reason you might see the error is if one of the buttons on the front button panel is stuck because of moisture or dust accumulation. Cleaning this panel and ensuring all the buttons are operational should get the error resolved as well. 


Reset the control panel 

Just like a computer or router, ACs are also electronic appliances controlled by logic-based circuitry. Resetting the control panel can help resolve the E1 error without much hassle. While usually unplugging the unit and plugging it back in again after some time does the trick, check your manual to ensure you’re following the right reset procedure. 

Also read: Roblox error code 103: 6 Fixes


Do a hard reset

A hard reset should also get any firmware glitches in your AC taken care of without much hassle. All you have to do is unplug the unit and press and hold down the power button while someone else plugs the unit back in again. Once you hear a beep, the AC should’ve been reset. 

You can now unplug the AC and plug it back in before using the unit and it should work just fine. If the aforementioned method doesn’t reset your unit, consult the manual for the correct procedure. 


Contact the manufacturer

If nothing else works, your best bet is to get in touch with the manufacturer and have a qualified technician come and take a look at your unit. There’s a pretty good chance of a mechanical or thermistor failure, something only a qualified technician will be able to fix or replace. 

Also read: What happens when a transformer blows?

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