My Haier 8,000 BTU air conditioner is showing an 'E1' in the digital display. It won't turn on. What is the problem?

1. HAIER HPY08XCM 8000BTU Portable Air Conditioner 2015

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This is what you error code means.
E1 = Room temperature sensor fault
Haier Air Conditioner Fault Codes


AC Repair Tamarac

There are generally no fitting to connect to the sealed systems of portable air conditioners. You can buy a 'saddle valve' that will pierce the suction side and allow you to check low side pressure, but they will allow a very slow leak in most cases.
It likely uses R134a instead of Freon.

Look for a little compartment of slot for a fuse or a reset button. Do you have the owners manual? That might give you some solutions as well.

Room temperature sensor weak. Replace it.

The E1 code is an error code that appears on the LED temperature display of some digital air conditioners. The error code could mean anything from dirty air filters to a damaged room thermistor, a safety connected to your thermostat that detects room temperature. Troubleshooting the cause of this error code may improve your air conditioner's performance

E1-Automatic filter clean reminder.

Turn the air conditioner OFF and unplug it. NOTE: The air conditioner must be unplugged for the automatic filter clean timer to reset.

Clean the filter. See the Care and Cleaning section in your use&care manual. After cleaning, replace the filter and plug the air conditioner back in.

e2 error

E-1. Indoor room temp sensor defective. replace it.

I called haier about this error code. E1 indicates that a button on the control panel or the reomote is stuck. I was instructed to unplug the unit and push each button at least 5 times, one at a time. Plug the unit back in, and this fixed my problem with error E1 and the unit works fine.