Hi. I'm Smitty. I am a professional appliance repair consultant here to help you diagnose, and repair, your appliance.
What is the model number of your unit, please?
Never mind, Lauren. The error codes are all th same for all LG HVAC units.
Unfortunately this error code indicates a problem with the high or low pressure switches. these are mountewd to the refrigerqtion units piping and are not servicable by the end user. It requires a set of guages, vacuum pump, refrigerant, etc. and a license to handle refrigerants from the EPA.
Sorry for the bad news Lauren, but this will require a licensed tech to repair.
Here is the exact code translation from the manual.
"High or low pressure switch open. Low pressure opens at 14 PSI, high pressure at 600 PSI. Flex Multi-ensure indoor unit wiring is not switched".
You have to putr a set of gages on th eunit and watch the pressure readings to determine which switch has failed.
Please let me know if you have any other immediate concerns.
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