Jump to content
Click here to check out our structured, online appliance repair training courses for rookies and experienced techs.

FAQs | Repair Videos | Academy | Newsletter | Contact

Stay connected with us...

Subscribe to our YouTube channel for lots of appliance repair tips and help! Subscribe to our MST Radio podcast to learn secrets of the trade. Sign up for our free newsletter and keep up with all things Appliantology.

DISCLOSURE: We may earn a commission when you use one of our coupons/links to make a purchase.

Testing my LG FMA102NBMA refrigerator compressor.


Recommended Posts

Hello - my LG refrigerator linear compressor does not turn on (LG fma102nbma).  When I checked the resistance across the three compressor pins I had zero, zero, and 16.6 ohms. Does 16.6 ohms indicate a malfunction? I was expecting a value like 7.5 ohms from information from the web. 

Link to comment
Share on other sites

  • Replies 2
  • Created
  • Last Reply

Top Posters In This Topic

  • EngineeredAppliance


  • Velkomen


  • Jorgem


Hi I suggest going back a few steps. If your compressor isn't starting this doesn't mean the compressor is bad. You could have a control issue. If you were to remove the PCB cover panel. Do you have any red lights blinking? If so how many times does it blink? Have you initiated the test button? If so did the compressor turn on at all? You see there are many steps to troubleshooting this issue before jumping to the compressor. A liner compressor typically operates on two pins. Power and common. You should check there typically between 5.1-6.3 ohms. You should also check those pins to earth to check for a grounded compressor. Even though LG has known compressor issues. You should not skip ruling out the control portion first. Thermistors, Control board, and Inverter. Caution These compressor operate at high voltage 80VAC -230VAC. If you are not comfortable working with high voltage or competent using a meter I would suggest calling a professional. If you would like more advice feel free to reply. 

Link to comment
Share on other sites

Hello, I am fixing same refrigerator. I have also done the pin test. Looks like it only works on 2 pins. I thought it would be like other models where all 3 pins had to show same Ohms. The board clicks and red light flashes 3 times. Same exact model. I am trying to determine the problem. I have checked current from board pins going to compressor I’m reading 300 and something not sure what that means. Any ideas? Have you fixed this problem?

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.