Getting error code 21-212 is this something I can fix myself

It mean Indoor Float Switch 2nd Detection,Self Diagnosys Error .check my shutdown the power and start after 10 min if it was not fix then its best option to call ur local technician to fix this.

1. How to fix lg with code CH05 - Fixya

   www.fixya.com/support/t12722126-fix_lg_code_ch05May 8, 2012 - Question about LG Air Conditioners. 2 Answers ... Hi, i've just moved into a house with a LG ART COOL C24AWR N80 inverter unit in it. Have just .... LG Inverter V model LMN096HVT air conditioner multi unit has error code 9.

if you have a soldering iron, just re soldered cold soldered joints at the pin of the components at the main board which may get loose contact.

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This is an Error code indicating a problem with the Control Module or power supply. Possibly an overtemp. You NEED your user guide to know what this error code means.
You can download a free maunal online using the key code on the s/n label.

Google search for P0705 Rio Error Code and I found this: http://www.kia-forums.com/3g-2006-rio-rio5/39179-error-codes.html Scroll down and the 705 code says: P0705 Transaxle Range Sensor Circuit Malfunction (PRNDL Input). Yer hubby will have to go to Autozone for a Hayes Rio Shop manual and look to see if its something he can fix. If it's in warranty, take it in. TJ

H-4 is an error code for the fixing assemblyand needs to be reset thru a simulation code, sometimes a power flucuation can cause this error and therefore may not need parts.
press #
press *
press clear
press *
when it is done properly the display will go blank
then enter 14
then press the start key, turn the machie off and then back on.
If the code comes back you'll need something for the fixing assembly
Good luck

Bob

COF30 THIS CODE SHOWS THAT THERE IS PROBLEM IN AUTO TONER SENSOR.MAY BE IT IS DIRTY .CLEAN IT PROPERLY .OR REPLACE IT.PROBLEM WILL BI REMOVED.DO NOT FORGET TO RATE A SOLUTION.MIAN JEE

go online and type in following information"

canon printer errors code 5400

enter

rod

error code 22 means short to ground. for a start check your power supply to see if anything is shorted to the ground.