Question about LG Heat cool Window Air Conditioner
That is correct, the remote/keypad sends the ON signal to the processor, which in turn sends it to the relay, when the relay is energized, lets current from L1 go thru to the board starting fan and compressor if Cool is selected. The fan uses 3 smaller relays, one for each speed that are activated separately (Fan Only) or together with the compressor (Cool).
So if the relay do not activate, the most common reason is not that is not getting the ON signal, it is because it is defective. If you remove the circuit card, the larger rectangular component with two flat prongs on top, one on which one end of the power cord connects to, its the Start Relay, (take a picture of it and label the wires to avoid confusion ) turn card upside down and de-solder relay, Buy one at any electronics store (about $5) and replace.
Good Luck!! Don't forget to rate this post!!
Posted on Aug 20, 2010
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Posted on Jan 02, 2017
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