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Heating, Air Conditioning, Fridge, HVAC/LG Portable heat pump does not heat


I have an LG LP1413SRH portable air conditioner/heater. The LG site says it is a true heat pump so it does not have heat strips for the heater function to operate. The air conditioner works perfectly. It cools around 650 sq ft even with temps in the 90's in Alabama where it is very humid. The problem is with the heat function. When I switch to heat mode, the compressor kicks on and the air starts getting warm. After 10-15 seconds, the compressor kicks off and will not kick on again without unplugging the unit for a few seconds. I have got the heat to work a few times by cycling through this process of unplugging and powering on a few times but once the compressor kicks off, it will not start again without going through this process again. When the heat started, it worked fine and heated the room as it should. I can replace the unit for a few hundred dollars but if it is something simple, I would like to fix it. I just need to know where to start.



You may have a lock out relay that locks out the compressor and only when you disconnect power to drop out the relay the compressor starts. The only thing I can think of at the top of my head is your compressor is cycling on high pressure, double check your indoor coil is clean ,as  in heating mode that is your condensor, also try running your blower fan on high speed to see if the compressor trips. Double check your air filter is clean also or run your system without the air filter for test purposes to see if it trips.  

Heating, Air Conditioning, Fridge, HVAC

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40+ years diversified experience.An HVAC/Refrigeration Self Employed Contractor since 1986. NATE Certifield. Answer questions pertaining to Residential and Commercial Air Conditioning , Warm Air Heating, Heat Pump systems.Mechanical and Electrical troubleshooting of these systems.Be as detailed as possible when describing problem.Packaged unit or split systems.No appliance questions.


Installation and Troubleshooting, Mechanical and Electrical, in following areas, Refrigeration ( Walk In and Reach In Coolers and Freezers ) Commercial Roof Top and Packaged Heating/Cooling ( Natural Gas,Propane, Electric, and Heat Pumps ) Computer Room Air Conditoning Systems,Commercial Residential Packaged and Split Systems Air Conditoning and Heat Pumps.Warm Air Oil , Natural and Propane Gas Heating systems.

Graduated from Private Technical School in 1975. An HVAC/Refrigeration Contractor . Have Unlimited Heating/Piping and Cooling Contractor License.Limited Sheetmetal Contractors License.NATE Certifield. York Certifield Master Heat Pump Technician 1986. Served 33 years combination Active Duty Air Force , Air Force Reserves and Air National Guard in the HVAC/Refrigeration Shop/Mechanical Shop. Troubleshooting/Installing HVAC/Refrigeration Equiptment Worldwide. Retiring in 2003 as a Senior NCO ,and a Mechanical Superintendent.

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