Question about LG PTAC LP070CED Thru-Wall/Window Air Conditioner

1 Answer

Compressor runs continuously regardless of temperature setting. How do I replace the thermocouple in the unit?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • LG Master
  • 8,220 Answers

I doubt that thang havind a thermocouple. Too new. Must have a thermister. A thermister changes in resistance as temp changes around it. The control monitors the change and shuts down the ac when the desired temp is reached. It is either going to be the thermister OR the control. If you do not know which it is you go with the cheapest part first right? I have a PTAC manual but it ain't an LG. I would be willing to bet though the same folks made this one. It will at least give a clue what to check on this beast: PTAC service manual

Posted on Aug 21, 2010

  • Dan Webster
    Dan Webster Aug 21, 2010

    Note: If your unit has mercury based controls on it, is a heatpump, and has emergency heat then my PTAC manual might help. Other than that it is a waste of time downloading it.

  • Dan Webster
    Dan Webster Aug 21, 2010

    Yep I looked yours up. It is not the same animal as the manual I posted. The thermisters at sears are like 6 bucks. I would try replacing them first.

×

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Whirlpool S20b American style f/f. The fridge is very cold and some foods are freezing.


Suggest lowering the refrigerator set point to a lower number such as 3. There is usually an indication of normal setting on the adjustments. Wait 24 hours and check the refrigerator compartment again. Use a thermometer to record the temperatures. The meat compartment will be normal just below freezing. If no success then read the following.

One reason that this occurs is that the unit is working near continuously to reach the freezer temperature. Another words the unit is not capable or cooling the freezer to the prescribed temperature. The result is the excess cooling eventually reaches the refrigerator section causing the refrigerator to freeze. The unit will if this is the case run nearly continuously. This situation is counter intuitive. Freezer not reaching set point, excessive cooling over cools refrigerator therefore refrigerator freezes.

The cause is either the freezer door/seal is not closing or sealing the freezer compartment or the compressor or defrost cycle is not functioning properly.

Check the freezer door seal using a strip of paper. Check to see if air is flowing from the vents in the freezer. Using a thermometer check the temperature of the freezer. Listen for and record if the compressor is running or not.

The normal freezer temperature is around '0' Fahrenheit. If no or little air is flowing from freezer air vents look for ice on the back wall. If ice is present it is likely the auto defrost cycle is not working. Attempt to defrost by hand which requires several hours with everything removed.

Check that lint and dust has not blocked the coils under the unit and that the lower fan is running. Usually warm air exits from the machine grill in the front. Remove the grill and check for air flow and debris buildup. Vacuum if necessary.

And unfortunately if the compressor runs continuously and no air blockage underneath would indicate that the cooling capacity is reduced requiring a major service or replacement.

Hope this helps?
26314418-hojrpjvrijqvxow3vipjsi5i-1-0.png

26314418-hojrpjvrijqvxow3vipjsi5i-1-2.jpg

26314418-hojrpjvrijqvxow3vipjsi5i-1-5.jpg

Oct 17, 2016 | Whirlpool Refrigerators

1 Answer

Portable A/C: Compressor runs intermittently and doesn't cool room


Your issue sounds like either a bad "pressure switch" or that the unit is low on "Freon." Either of these problems will cause the compressor to start and run shortly then compressor cuts off, then and repeats itself.

From your description It really does Not seem to be a "bad board in that unit" because the compressor is starting up, even though the compressor is not staying on long enough to cool said area.

Aug 15, 2016 | Heating & Cooling

1 Answer

Sub Zero 550 Refrigerator Compressor runs continously?


Sounds Like You Have A Clogged In The System. If the compressor is running. The system will have to be vacuumed and flushed and re charged. Is temperature of the compressor above 120?

May 10, 2014 | Sub-Zero Refrigerators

1 Answer

Maytag MFI2569VEM chills to the point that everything in the refrigerator section will freeze, regardless of the temperature setting on the front panel.


these tipe of units have an electronic board that controls basicly everything thats your problem you need to replace the electronic board. some times a temperature sensor wired to the elect. board fails but most of the time the board is the problem

Feb 10, 2014 | Maytag Refrigerators

1 Answer

Bought 4 small Gold Star units in 2009. One quit cooling altogether, one blows slightly cool while the longer another stays on the less it cools. One did not cool well when it was new. All filters are in...


http://www.appliancepartspros.com/partsearch/frame_diagram.aspx?diagram_id=28700000&pkw_=basket&model_id=5520000&NewWindow=1

Download this illustration and then using a good multimeter start basic troubleshooting.


All residential window air conditioners have a cooling system made up of four primary components, a compressor, an evaporator fan, a control or switch, capacitor.When the thermostat is calling for a colder room temperature the compressor is energized. It is normally very quiet. The evaporator is always located on the front of the air conditioner. It also has silver fins. Be sure it is clean. Use a foaming type cleaner and rinse with plain water. Because the evaporator is absorbing heat, it is very cold to the touch. The temperature drop causes any humidity in the air to collect on the evaporator - sometimes called sweat. There is a fan inside the air conditioner that circulates the air for the evaporator and condenser coils. The circulating fan and compressor are running simultaneously. The fan motor has two fan blades attached to it on either end. The fan blade on the inside part of the unit continually draws room air over the evaporator coils, which are cold. The fan blade on the outside part of the unit continually draws fresh outside air over the condenser coils, which are warm. Because the evaporator coils are cold, they cause moisture in the room to collect on them, much like a cup of ice water on a warm, humid day. When the amount of moisture increases, it begins to drip down off of the coils into the bottom pan of the air conditioner.
If the compressor fails to start or the fan you may need to replace the capacitor.
You may need a hard start kit.
bobicehouse_6.gif


Thermostat control The thermostat on a window air conditioner works by sensing the air temperature entering the air conditioner. As the air entering the unit reaches the set temperature it will cause the compressor to turn off. The blower may continue to run depending on the selection chosen on the control panel. Digital thermostats work on a similar principle but display a more precise temperature.
Test for continuity with the multimeter between the two terminals . Warm you should read continuity (contacts closed). If not change it.
Selector switches The air conditioner selector switches allow the user to choose the fan speed. The compressor always runs at the same speed regardless of the settings. If low cool is chosen, for example, the fan runs at a slower speed but the compressor still offers the same cooling capacity. There are other switches to control louver operation and other features on some units.

Jul 23, 2011 | LG Goldstar GWHD5000 wall/window Air...

1 Answer

Refrigerator is freezing food.


Possible that the compressor is not shutting off and is running continuously. This can be due to failure of the thermostat. Look within the freezer back side for the thermocouple , sometimes the wires can be cut by frosting or there can be loose joints in the links.
If not the thermostat can be faulty and must be replaced.
make sure that the relay contact of the compressor is aslo not struck. Reducing temperature settings must shut it down.

Sep 17, 2010 | Kenmore Elite 22.4 cu. ft. Bottom Freezer...

2 Answers

What do the controls on a portabel AC mean. Like the mode button.


my 4m40mitsubishi model have something nocking during a litlle accelerating in the acelerator

Oct 07, 2009 | Heating & Cooling

1 Answer

Outside fan and compressor does not shut off


the system is wrong, the blower must run continuously , and the compressor is the will stop if the temperature setting is reached. The outside fan is the same as the comp.

Jun 16, 2009 | Heating & Cooling

1 Answer

No cold air coming from the registers.


If your compressor is running outside (low hum noise) then your probably need freon .If the compressor is not running could be a bad cap or bad compressor

May 22, 2009 | Heating & Cooling

1 Answer

Compressor starts and doesn't stop


Relay for the compressor may be stuck ( Contacts welded) both the fan and the compressor should operate at the same time. Have the relay(s) checked and possibly replaced.

Apr 29, 2008 | Dometic Rooftop RV Air Conditioner

Not finding what you are looking for?
LG PTAC LP070CED Thru-Wall/Window Air Conditioner Logo

Related Topics:

255 people viewed this question

Ask a Question

Usually answered in minutes!

Top LG Heating & Cooling Experts

Donni Steen

Level 3 Expert

659 Answers

Tim Whalen

Level 3 Expert

3072 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Are you a LG Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...