Question about LG Heat cool Window Air Conditioner

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My LG Heat/Cool unit does not heat, AC cooling is excellent, how do I fix the heating part of unit?

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: goodman ac / heat pump

Goodman energizes it reversing valve in the cooling mode. Usually in the "o" circuit of the thermostat wiring.You may have that wired hot somehow.

Posted on Nov 28, 2007

  • 63 Answers

SOURCE: GE Zoneline 2100 heater/ac won't heat/doesn't shut off

Unplug them and wash out the condenser coils outside then check them again. See if there is any change.

Posted on Jan 25, 2008

  • 124 Answers

SOURCE: Won't heat or cool

as a general rule you sound like you have a compressor that is mechnically locked up. in other words it can't free itself from a stationary position and begin pumping and moving the piston. this is caused by one of several things. first kill power ,and carefully, and methodically examine all wires and terminal connections. be sure all are clean , snug and not burnt off etc. even the ones attached to the compressor itself. the compressor wire cover comes gently off and is usually held in place by a spring clamp be sure to replace when your done checking. if all wires check good then go to step two. that is a check of the capacitors. the silver metal large capacitor is the run capacitor. it keeps the compressor power in the windings out of phase so it runs same way everytime. it has a rated value stamped on its side. it should check with a volt meter that checks capacitors at not less than 90 percent of its rating . a 60 needs to check no less than 54 microfareds. etc. some capacitors have a common input side and a dual output side. they are labeled on top where the wires goes to the condensor fan and the other goes to the compressor. the larger circuit ,common in, to herm out is for the compressor. if in doubt label all wires , make a diagram and remove it and take to an electric motor shop and let them test it. in addition to the run capacitor that keeps the compressor going, you may also have a start cap that is usually black plastic. they have a" Yes by gosh you will" start function and store up voltage and deliver a powerful boost on start up to make the compressor get going. it can be tested the same way. be sure to ground the capacitors before testing after power is turned off by shorting across the terminals to bleed off any stored voltage. , with a screwdriver blade. by the way if you look at the silver run capacitor and its swollen up or bloated looking then its bad. you'll know what i mean if you ever see one. looks like it has the mumps. they really puff up. top and bottom should be normally close to flat. if all that checks good then you must apply and amp probe to the black wire going to the compressor. when it tries to start observe the amp draw. if it is like 48 to 65 amps then the compressor is mechically locked up and probably needs replacing. if you don't have a plastic hard start capacitor and relay you can add one and it can many times break the compressor loose and you can get a few more years out of a compressor thats getting weak. try a T05 hard start kit or a KS1 hard start kit. to5 for up to three ton and a ks1 for 4 and 5 ton. simple to install .be sure the start relay is positoned correctly, instructions are on the package. good luck let me know outcome.

Posted on Nov 04, 2008

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SOURCE: I have a ruud ac

We need model # and serial #s please!

Posted on Dec 22, 2009

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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

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Unit not working correctly. The unit worked for the winter, few days ago I turn on the AC and noticed that it wasn't cooling like it should.

It's could be the board or a heat relay. See if you have 24 volts on "x2" im assuming, emergency heat when in cool mode if so it's the board. Or unhook black or x2 or your emergency heat from board and run unit in cool. If heat stays on its a relay

Jun 02, 2016 | Heating & Cooling

1 Answer

When I turn the heat on my wall unit the air door closes and the cooling light flashes 7 times. Will cool but will not heat.

Pls check indoor to out door 6 wirings. May be interchanged by mistake.

Example- Black wire in N with indoor but connected in C with out door.

And also check whether the sensor wire from indoor to out door has connected.


Nov 15, 2013 | LG LMU187HV LMN096HVT LMN096HVT 21 SEER...

1 Answer

Why did my ac quiet blowng heat

Check the controls, this unit most likely a reverse cycle air conditioner. It can be set to cooling or to heating. The conpressor is reversed to heat or running normally to cool.
If it is not then the compressor is not working and it is just blowing room temperature air.

Apr 03, 2012 | LG Heat cool Window Air Conditioner

1 Answer

The unit has never worked properly and is only a year old. It does not produce any heat. How can I resolve the problem?

Is it giving cool? If yes, to solve heat problem, set th temp +5 degree than your room temp and mod in " Heat". If no heat and no cool means check your compressor is working.

Dec 26, 2010 | LG Heat cool Window Air Conditioner

2 Answers


Please try to understand with your model, the tonnage and also whether it's cool only or heat & cool. 12,000 (12)...........means 1 TR. with this help your a/c is 1.5 Tr and if it's heat and cool definately there wil be indication in the model cde it self. Ex.......A18TH DF..... like this. There will be H added in the model code itself. Yours is not heat mode. Is it helpful?

Dec 13, 2010 | Amana PTC094B35AM Air Conditioner

1 Answer

Our window AC/heat unit fan only buzzes when turned on- no matter whether you turn on fan only or heat or cool mode.

so the fan does not spin and blow air? it could be a stick broken fan try free spinning it make sure its turned of. if fan spins freely its probably your start capacitor which is not to expensive.

Nov 10, 2010 | LG Heat cool Window Air Conditioner

2 Answers

We have a 2005 Country Coach Allure with 3 Dometic rooftop air conditioner/heat pumps. One of the units will come on start to cool then quickly turn to heat then cool then heat. What could the problem...

Hi; Sounds like a problem with the tstat or the defrost sensor. Also have these units been cleaned yearly. Also if the differential between heat and cool is small this will cause the unit to cool then heat due to the low differential at the tstat...alpharome416

Feb 23, 2010 | Dometic Rooftop RV Air Conditioner

2 Answers

Fan slows to about half speed when heat cycle kicks in

The heat fan speed is slower than the cooling speed. About 300 rpm less.
You may not have a problem.

May 20, 2009 | LG Heating & Cooling

2 Answers

Hi- Can not tell if my unites are straight cool / heat or a heat pump.

if you look inside the condenser unit outside,see if you see the big reversing valve,if not it is a straight cool,heat, the heat strip ins in the air handler so you would have to take the side panel off and look for the heat stripe,my the way heat pumps also have a aux.heat stripe just in case it does not get cold enough outside,hope this helps you-mike

Oct 25, 2008 | Carrier 38CKC042 Air Conditioner

3 Answers

LWHD1200HR - LG 12000 BTU Heat / Cool Window Air Conditioner

i have a lg lwhd 1200hr window ac the heating system dont work . it blow cold air out not heat. can you help me

May 28, 2008 | LG Heat cool Window Air Conditioner

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