Question about LG LAN186HV / LAU186HV 18,000 BTU 15 SEER Art Cool Heat Pump Ductless

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No heat but fan keeps running

Recently my LG mini split stopped heating. The inside fan will continue to run, but with no heat. The outside unit comes on for about 3-5 minutes before shutting off, while the inside unit continues to run. There are no error codes on the outside unit board, and I replaced the thermistor over the summer when I was having an issue with cooling. The filters are clean, the outside unit is clean, and there isn't any ice on the unit whatsoever.

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  • 46 Answers

If the air conditioner compressor runs all the time the main control board might be defective. The main control board provides the voltage to the fan motor and compressor. These boards are often misdiagnosed. Check all other components to be certain this is the cause of the problem.

Posted on Nov 25, 2013

  • Marc D
    Marc D Nov 25, 2013

    The compressor and outdoor fan only run for 3-5 minutes before turning off. Only the inside fan continues to run

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Posted on Jan 02, 2017

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SOURCE: LG Ductless Mini Split System LAN125hv: Heat pump doesn't run.

CA: Compressor Discharge Sensor Fault

Contact a qualified service technician and have them replace this sensor.

Posted on May 04, 2010

SOURCE: I have a 18000btu LG

Hello.I think they are on to something with shortcycling on temp sensor.I think it should be sampling the return air instead of (inside coils ?).A 2*f dead band use to be built in (factory installed) to thermostats to prevent on/off, but not sure in this case.Try a new sensor location(return air) and see if anything changes.

Posted on Oct 26, 2010

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