Question about LG LRE30755ST Kitchen Range

2 Answers

Monitor shows me f1 - LG LRE30755ST Kitchen Range

Posted by on

Ad

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 2 Answers

According to the LG30755 Service Manual an F1 error indicates a key short error. This can be remedied in several steps, the least expensive being the first: Unplug stove. Remove the entire back of the range and you will see a big printed circuit board right behind the rangetop controls. The keypad-tail is the wider of 2 ribbon connectors. Remove the keypad-tail and, after replugging in the unit (Be careful! Don't touch any connections with the power on and the backing off.) see if the F-1 recurs or not. If no recurring F1 then the manual says to "replace keypad or keypad assembly". If the F1 pops up again you can shut the power back down and remove the PCB and inspect main PCB connector (CN11) pin to pin. This means you have to look at the soldered pins on the back of the PCB at the keypad connector (which is labled CN11). If you are not familiar with PCBs (I had to teach myself to solder to fix my television not too long ago but I was motivated--I didn't want to pay to have it repaired!) and can resolder the pins if they appear cracked or damaged, then I would suggest just buying a new PCB online. It will cost about $140 delivered. Try AppliancePartsPros.com or PartStore.com. I've used both and have had great service. You'll probably get your part in 2 - 3 days even though they say it'll be 10 days. AppliancePartsPros has exploded views so you can eyeball an illustration of your unit to get the part number correct. The mfg part number of the PCB is: 6871W1N009A but even though the vendors may have their own part numbers you can search for the PCB under the number I gave you and it will show you the right thing. They'll probably just call it "PCB Assembly" but it'll be about $125 - $140. I've replaced mine TWICE! It will be the root of many problems: No keypad, oven too hot, oven not working, warming drawer not working, the list goes on and on.

I got my service manual from LG. For FREE! I called customer service and he sent me a PDF. This was the best thing I've ever gotten from any manufacturer. Anyway, I hope this helps you. It's been several months since your question was posted, but I just happened on this website today and thought I'd browse about a bit. If you still have your range try calling LG customer service. The Service Manual's part number is: 3828W5S6293. 'Course, if everyone had one of these for all of the products we purchase it might put some repair guys (and JustAnswer.com) out of business.

Posted on Sep 10, 2011

  • Steve Schiller Oct 12, 2011

    Thanks for this advice. My oven (LRE30755ST) displayed the F1 error after I did my first oven cleaning cycle. I see that many people have had this same problem and am wondering why LG didn't design the oven better so that it doesn't break right after cleaning it. I did the test as above and found that after disconnecting the ribbon cable from the "key membrane assembly", the error code went away and it wanted me to set the time. I ordered the key membrane assembly from AppliancePaartsPros.com and it was $56.03 and the part number is 383EW1N006H which was not specified above. Now my range is working perfectly and I even tore apart the old keypad to see if I could tell what failed (due to too much heat). I could not see anything that looked like damage and it will stay a mystery as to why it failed. Hope this helps some of you that have this problem.

×

Ad
  • 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.

  • Master
  • 15,935 Answers

Here is some wisdom for understanding F1 fault codes.

In some models, there are subcodes that make diagnosis even easier.

Here's a simple explanation of what's going on and how to troubleshoot:

The F1 code indicates that:


a. The electronic range control (ERC) is sensing heat in the oven when in a time-of-day (i.e., not cooking) mode.

b. The ERC is receiving information to run multiple heat functions simultaneously.


Although different components (depending upon the model) could generate the code, simple and straightforward testing using your ohm meter is all you gotta do to test for it.

1. Check the oven temperature sensor. The oven sensor has to be within spec or it will cause the F1 code.
As an example of being out-of-spec, the ERC will generate an F1 fault code when the sensor shows 1650 ohms during a time-of-day mode.
This is equivalent to 350°F in the oven.
The resistance isn't high enough to generate an F2 code (runaway temp) or an F3 or F4 code (shorted/open sensor circuit).
The ERC monitors the sensor circuit after a heat cycle and expects the resistance to drop back to 1050-1100 ohms.
The fault code is generated when this doesn't happen. Checking the sensor circuit means also checking the harness,
harness connections and the sensor itself.

2. If the oven sensor circuit checks okay, then turn your inquisitive eyeballs to the touchpad.
If the range has a separate touchpad/keyboard, the keypad may have moisture that is shorting several circuits simultaneously.
If the F1 code is given immediately (instead of during or after a heat cycle),
remove the ribbon connector from the touchpad to the ERC after clearing the F1 code. If the F1 code does not return in five minutes,
then cast a suspicious gaze upon the touchpad/keyboard. Shorts may be caused by using an ammonia-based glass cleaner.
The touchpad surface will absorb ammonia-based cleaners that are sprayed directly on the glass surface. When heat is applied,
the surface material can break down causing shorts.
If you're gonna use ammonia-based cleaners on your control panel, then you should spray it on the rag and then wipe the touchpanel
-don't spray directly onto the surface of the touchpad.

3. On Amana ranges with a rotary temperature dial, be sure that the knob is in the OFF position when performing tests.

4. If these tests all check good, then replace the ERC.


Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.
$%^

Posted on Oct 01, 2010

Ad

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

Lines on the screen


The lcd screen is probably bad. It's either the lcd screen or the video card inside the computer. To isolate the problem connect an external monitor to the computer.

Plug in an external monitor and see if the display shows up on it. It can be any kind of monitor even the old big fat crt monitors as long as it has a vga cable to connect to your computer's vga port. If the video shows ok and without the lines on the external monitor that proves your video card is ok, ,but your lcd screen is bad. The video will show on most systems when you reboot without you having to do anything. Some systems will require you to hit the FN (Function key) + F1 thru F12. Hold down the FN key then hit the correct key for displaying on the monitor (F1 thru F12). The correct key will normally have CRT/LCD on it or it will have the icon of a display.

Jun 06, 2012 | Computers & Internet

1 Answer

Toshiba m60-104 screen dark new screen new iverter


Have you tried an external monitor?

Plug in an external monitor and see if the display shows up on it. It can be any kind of monitor even the old big fat crt monitors as long as it has a vga cable to connect to your computer's vga port. If the display shows on the external monitor that proves your video card is ok and your lcd screen is the issue. The video will show on most systems when you reboot without you having to do anything. Some systems will require you to hit the FN (Function key) + F1 thru F12. Hold down the FN key then hit the correct key for displaying on the monitor (F1 thru F12). The correct key will normally have CRT/LCD on it or it will have the icon of a display.

If is shows on the external monitor, then you would have to question if the new screen and lcd inverter is bad. Just because they are new don't mean they work. Are you sure you purchased the lcd screen and inverter that is for your model?

May 23, 2012 | Toshiba Satellite M60 Notebook

1 Answer

Toshiba satelite pro red spot on screen


Sounds like your screen is going bad or your video card is bad. Try plugging an external monitor to the laptop to isolate the problem. Borrow a monitor from a neighbor, friend, relative or co-worker and plug it into the laptop. if the borrowed monitor displays without the red spot then your original monitor is bad. If the borrowed monitor shows the red spot then your video card inside the computer is bad.

Plug in an external monitor and see if the display shows up on it. It can be any kind of monitor even the old big fat crt monitors as long as it has a vga cable to connect to your computer's vga port. If so that proves your video card is ok. The video will show on most systems when you reboot without you having to do anything. Some systems will require you to hit the FN (Function key) + F1 thru F12. Hold down the FN key then hit the correct key for displaying on the monitor (F1 thru F12). The correct key will normally have CRT/LCD on it or it will have the icon of a display.

May 12, 2012 | Computers & Internet

1 Answer

Screen do not shows light


Shine a flashlight on the dark screen to see if you barelysee the icons on the desktop. If so, then the LCD Inverter is bad.

Plug in an external monitor and see if the display shows up on it. It can beany kind of monitor even the old big fat crt monitors as long as it has a vgacable to connect to your computer's vga port. If so that proves yourvideo card is ok. The video will show on most systems when you rebootwithout you having to do anything. Some systems will require you to hit the FN(Function key) + F1 thru F12. Hold down the FN key then hit the correctkey for displaying on the monitor (F1 thru F12). The correct key willnormally have CRT/LCD on it or it will have the icon of a display.

If you see no icons by shinning a flash light and the external monitor works,then your screen is bad. If you see no icons by shinning the flash lightand nothing shows on the external monitor, then most likely your video card isbad.

May 10, 2012 | Computers & Internet

1 Answer

Laptop turns on but screen doesn't show


Shine a flashlight on the dark screen to see if you barelysee the icons on the desktop. If so, then the LCD Inverter is bad.

Plug in an external monitor and see if the display shows up on it. It can beany kind of monitor even the old big fat crt monitors as long as it has a vgacable to connect to your computer's vga port. If so that proves yourvideo card is ok. The video will show on most systems when you rebootwithout you having to do anything. Some systems will require you to hit the FN(Function key) + F1 thru F12. Hold down the FN key then hit the correctkey for displaying on the monitor (F1 thru F12). The correct key willnormally have CRT/LCD on it or it will have the icon of a display.

If you see no icons by shinning a flash light and the external monitor works,then your screen is bad. If you see no icons by shinning the flash lightand nothing shows on the external monitor, then most likely your video card isbad.

May 07, 2012 | Acer Computers & Internet

1 Answer

I have a 1cm verticle stripe on my Dell Studio 1737 ?


Your lcd screen is going bad. You can verify this by plugging an external monitor to your laptop. if the external monitor shows without the vertical stripe it means the video card is good but your old screen is bad. If the external monitor shows the stripe then it means the video card is bad.

Plug in an external monitor and see if thedisplay shows up on it. It can be any kind of monitor even the old big fat crtmonitors as long as it has a vga cable to connect to your computer's vgaport. If so that proves your video card is ok. The video will showon most systems when you reboot without you having to do anything. Some systemswill require you to hit the FN (Function key) + F1 thru F12. Hold downthe FN key then hit the correct key for displaying on the monitor (F1 thruF12). The correct key will normally have CRT/LCD on it or it will havethe icon of a display.

May 02, 2012 | Dell Studio 1737 (Studio 1737-RubyR) PC...

1 Answer

I have an hp dv5 1004nr when it was on it would go out and show strips in def. colors no will not turn on


Are you saying the computer will not turn on at all or are you saying the monitor will not turn on?

If it sounds like your computer is on and running but you don't see anything, then your monitor is bad based on the stripes you say it used to show.

Plug in an external monitor and see if thedisplay shows up on it. It can be any kind of monitor even the old big fat crtmonitors as long as it has a vga cable to connect to your computer's vgaport. If so that proves your video card is ok. The video will showon most systems when you reboot without you having to do anything. Some systemswill require you to hit the FN (Function key) + F1 thru F12. Hold downthe FN key then hit the correct key for displaying on the monitor (F1 thruF12). The correct key will normally have CRT/LCD on it or it will havethe icon of a display.

Apr 26, 2012 | HP G60-235DX Notebook

1 Answer

Fn f1 diidnt do it, hdoes any one no if i can fix it wihout having to replave moniter or connection switch?


I think you are hitting the wrong Function Key combinations. Why are you using an external monitor anyway? What is wrong with the laptop's LCD Screen?

Plug in an external monitor and see if thedisplay shows up on it. It can be any kind of monitor even the old big fat crtmonitors as long as it has a vga cable to connect to your computer's vgaport. If so that proves your video card is ok. The video will showon most systems when you reboot without you having to do anything. Some systemswill require you to hit the FN (Function key) + F1 thru F12. Hold downthe FN key then hit the correct key for displaying on the monitor (F1 thruF12). The correct key will normally have CRT/LCD on it or it will havethe icon of a display.

Each time you press the FN key plus the correct Function Key it toggles the Display between three stages (Show on Laptop only, Show on External Monitor Only, Show on both the laptop and the external monitor).

Apr 09, 2012 | Computers & Internet

1 Answer

Top half of my monitor screen shows at the bottom


Try plugging an external monitor to your laptop and see how it displays on it. It can be any kind of monitor even the old fat crt's as long as it has a vga cable that will connect to your laptops vga port.

If the display does not immediately show up, then you will have to hit the FN (Function key)+(F1 thru F12) to show the image. Press and Hold the FN key then hit the correct F1 thru F12 key. The correct F1 thru F12 key will have either CRT/LCD written on it or it will have a display icon on it.

If the image displays correctly on your external monitor, then you will need to replace your lcd screen.

Mar 25, 2012 | Computers & Internet

Not finding what you are looking for?
LG LRE30755ST Kitchen Range Logo

738 people viewed this question

Ask a Question

Usually answered in minutes!

Top LG Kitchen Ranges Experts

JP Services
JP Services

Level 2 Expert

310 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Mike Carew

Level 3 Expert

969 Answers

Are you a LG Kitchen Range Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...