LG Lw1210hr air conditioner / heater has power but will not tuen on.

Compressor has a problem internally.

as there are two control boards in ac units ( split systems) and one in a window unit
it could be the inside board ( they do not suffer power surges to well or vermin infestations at all )
before you waste more money I suggest that you get a technician in to determine the fault and if parts are readily available.

A heat pump is an air conditioner that reverses its refrigerant flow. In the cooling mode, the evaporator is cold to the room and its condenser is hot. In the heating mode, a valve reverses the refrigerant flow and makes the evaporator warm and the condenser cold.

With heat pumps that's the way they work. In heat mode they are using the evaporator as the condenser and it blows heat out the front and cold out the back. In cooling mode, a reversing valve switches the gas flow reversing the operation of the coils and it blows cold out the front and heat out the back.

There's a plug on the back of the unit. It's located in the center at the very bottom down near the a/c power cord. Take your unit outside or somewhere that the water can spill out. Remove the cap and pull the black rubber plug out. Let the water drain and replace the plug and cap.

I got this from the LG customer service:http://lge.andrewselectronics.com

Hi,

Here is a tip that I wrote about how to add refrigerant to a air conditioner or cooling system

How to add Freon to a Air Conditioner or Refrigeration System

heatman101

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Hi,

Here is a tip that I wrote about how to add refrigerant to a air conditioner or cooling system

How to add Freon to a Air Conditioner or Refrigeration System

heatman101

A dehumidifier works like a low powered air conditioner where a fan draws air through a refrigeration unit which cools it and condenses water vapour and collects it in a container.

There is likely to be at least one air filter so some cleaning of the air takes place and such filter(s) will need attention periodically and in addition most manufacturers claim their products need servicing every 3 years.

Best results will be obtained when the room is closed and ventilation minimal and the capacity of the machine is more than adequate for the space where it is sited. A room with an open window or where the door is opened frequently is not really a suitable site for a dehumidifier.
It is important to choose a machine that is somewhat too large as efficiency will fall between service intervals.

It is quite possible a manual for a different but similar model by the same manufacturer will provide some useful information...