LG LMV1813ST Microwave Oven - Answered Questions & Fixed issues

F4 means sensor open, You have to check the Humidity sensor.
If you wish to get some details; visit the site linked here. Pull up older posts. http://electro-medical.blogspot.com/

LG LMV1813ST... | Answered on Feb 07, 2017 | 642 views

This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

The lights can can be inoperable or stuck on or stuck in "night light" mode. Sometimes this will similarly affect the fan operation or inside light, too.
The problem is on the controller assembly, which I regularly repair. Details are here.

I also have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

LG LMV1813ST... | Answered on May 24, 2016 | 195 views

The circuit breakers may both be functioning properly. What might be happening is that both circuits have other current drawing appliances on them. The circuit breakers react to the sum of all of the currents drawn by all of the devices on that circuit. So, if you have a 15 amp microwave and an 8 amp refrigerator on the same circuit, you would overload a 20 amp circuit by 3 amps.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_29ad5d1dd86564b0

LG LMV1813ST... | Answered on May 09, 2016 | 93 views

If the control panel lights up intermittently, then you either have a loose connection somewhere near the panel, or a failing component on the circuit board itself.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_29ad5d1dd86564b0

LG LMV1813ST... | Answered on May 09, 2016 | 241 views

The fuse can be replaced, but the underlying issue should still be investigated and resolved. Otherwise the new fuse will blow also.
If the microwave is not working the thermal fuse may have blown.
When a microwave stops working the problem is usually the line fuse or within the high voltage circuit; either the high voltage capacitor, diode, transformer or magnetron.

LG LMV1813ST... | Answered on Sep 28, 2015 | 744 views

take cover off there are plastic catches who could have wear and tare

LG Microwave... | Answered 3 days ago | 45 views

First, check your users manual for proper programming functions. Then either return the oven to the dealer for a replacement, if their policy allows it or contact a factory authorized dealer to service it under the warranty policy.

LG Microwave... | Answered on Jul 01, 2019 | 16 views

I would contact an LG service department and order one.

LG Microwave... | Answered on Jun 07, 2019 | 25 views

The outer cover will have to be removed to gain access.

LG Microwave... | Answered on May 22, 2019 | 40 views

try this manual i found

LG Microwave... | Answered on Apr 22, 2019 | 46 views

Disconnect power and wipe down with vinegar and baking soda solution. Then plug in and heat the same solution for a minute or two. This should take that smell away.

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LG Microwave... | Answered on Apr 04, 2019 | 60 views

AC fuse is located just near mains cord ends up inside the top cover,it is mounted on small PCB,DC fuse is not used generally only surge protector MOV is mounted on main PCB for safety of PCB assy.

LG Microwave... | Answered on Mar 15, 2019 | 75 views

Noise may be due to turn table motor or cooling fan,watch and diagnose,if turn table motor is noise than replacement is solution,in the case of fan noise clean & oil it.

LG Microwave... | Answered on Mar 05, 2019 | 87 views

Problem is due to touch key assembly,get it replaced ,microwave will work perfectly.

LG Microwave... | Answered on Mar 04, 2019 | 72 views

Problem is due to faulty power supply in the PCB assembly,if you are technical person check the power supply components other wise consult technical person.

LG Microwave... | Answered on Mar 04, 2019 | 83 views

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