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I have a art col air conditioner and it has come up c5 can you tell me what this means thanks

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C5 = COMMUNICATION BETWEEN THE INDOOR P.C. AND THE OUTDOOR P.C. MISSED. In other words, there is a bad connection in the indoor outdoor cable, possible cause - rats.

Posted on Nov 18, 2009


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I have an LG LAN126HNP model and it will not go in to heat mode. Any advice?

perhaps the reversing valve coil is burnt out. Trace the wires by sight from the terminal block that actually go to the RV coil. By using a ohms meter check to see whether the coil is open circuited. If you have no reading on your meter when you first connect it, then the coil will have to be replaced. dont forget to turn off the power before you stick the fingers in the works. Col.

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Air warm, so turned conditioner off and on, eventually air became cooler

I assume you are meaning that the AC took quite awhile to lower the temperature in the house. If so the system may be low on gas. Col R

Mar 04, 2011 | Heating & Cooling

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I have a r/c ducted LG air conditioner. The control panel is flashing displaying CH 12. The filter is clean, so shouldn't be the issue. Do you have a suggestion?

Hi Jamie hig595, I suggest that you check around both machines to see if you can see any oil stains,: ie: inside the outdoor unit, where the pipes are connected to the outdoor machine and indoor machine, or even around the outdoor case itself. Any oil stains would suggest that your system has lost gas and therefore you will need a serviceman. If thge machine will run at all are the fans working? hope this is helpful,regards Col

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We recently had a flood go through the house and now when we turn the air conditioner on it displays c5 what does this mean?

C5 Indoor malfunction of gas pipe thermistor. Check amps of your unit .If very less than specified, it's gas leak. If only little difference and having freezing blow, it's coil and blower wheel dust blocked. Service the unit completely and run the unit.
If gas leak call repairman to find leak and arrest and then recharge gas.
Hope it's helpful. Thanks,.

Dec 25, 2010 | LG Heating & Cooling

1 Answer

Myair conditoner is not funtion or getting col air please tell me if is the compressor and how much is the value thanks


Here is a tip about troubleshooting your air conditioner...
There are many things that can cause your air conditioner not to cool…

Air Conditioner Trouble -Review the Possibilities


Aug 19, 2010 | Goodman Heating & Cooling

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New lg air conditioner stops at c5 what does mean? pls help

Call an LG Support Representative at (800) 243-0000.

Hope this helps,


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Art cool error c1 "What about that

CH1 means return air sensor faulty or not connected or positioned incorrectly

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Ch 5 error code

ch5 error code, means that there is a
communication error (serial comunication) between the outdoor and the indoor unit.
Only for LG-airconditioners.

Jan 02, 2009 | LG Art Cool LA121HNP Split System Air...

1 Answer

Error C5 LG Art Cool Split System Air Conditioner

Probably a capacitor in the either the compressor or outdoor fan. Don't know if they are dual capacitor or each has it's own. This is just according to the other posts on this site. I would call in a tech to have a look at it. Should be able to diagnose this in about 10 minutes.

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