Customer service is VERY limited and lack of knowledge is not there either. Called 3 times today about a microwave questions that stopped working for a customer I installed for a kitchen remodel. Owner had used the microwave 5 times to heat up items, then nothing worked. Went to the house thinking it was an electrical issues to find 122V coming out of the outlet, great no power issue. Call for support went thru the check list to include unplugging and waiting 3 minutes, still nothing. Owner setup for a tech to come out which ended up replacing the circuit board. Went I went back today to reinstall the microwave and did a test the owner stated it was much quieter than before. I turned on the exhaust fan and the owner stated that the noise I was hearing. I asked if they had turned on the exhaust fan while heating items before it died, "No." Which explained the bad circuit board. Also called back today for tech support, spoke with 3 customers reps 1st no help hung up, 2nd gave me another customer service number, 3rd said I'm tech support which she was not then said I will transfer you , where, to tech support. Recording we are ONLY OPEN Monday - Friday not open Saturday or Sunday. LG's customer service members do not know LG's own operation hours??