Another wonderful day in the life of owning an LG refigerator. I am having a problem with the refrigerator temp control changing by itself when the doors are open. It happens intermittently, but more frequently as time goes on. I also do not have control of the temp using the microswitches on the control panel. I have to pull the plug and then plug it back in to get the fridge temp back to 37 degrees. Any ideas anyone?
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LG LFC21760 Temp control changing by itself
Started by bikesrfun, Jan 22 2013 08:52 PM
3 replies to this topic
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#2
Wingerman
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- Chief Master Appliantologist
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- 77 posts
Yamabushi
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Posted 22 January 2013 - 09:52 PM
This model is notorious for light staying on, throwing temp control sensor off target temp as doors open and close. Also, the Micom (PCB) takes 3 inputs (Freezer sensor, Refrig Sensor, and Defrost Sensor) and COMPARES voltage inputs (O to 5V) to make temperature control decisions. .5 to 5V is a "normal" operational reading from sensors to Micom--refer to manual for pin numbers. So, with that said, a good place to start is ohming out the three sensors per service manual and proceeding to an operational test with voltages. If sensors pass ohm testing, then suspect the Micom.
Edited by Wingerman, 23 January 2013 - 12:10 AM.
#3
john63
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Sensei
Posted 22 January 2013 - 11:02 PM
Post the SERIAL NUMBER.
To eliminate:
Musty odor
L-O-N-G cycle times
Dingy/yellowing whites
Suds error message
Slow spin speeds
Intermittent water leaks (from rear of washer)
And other annoying symptoms which vary brand-to brand.
Read below:
The *correct* amount of HE (High Efficiency) detergent that should be used in any front load or agitatorless top load washer with tub sizes 3.0 cu ft and larger is as follows:
HE: (2) Tablespoons Per Wash Load
HE 2X: (1) Tablespoon
HE 3X: (1) Teaspoon
Perform a TUB CLEAN CYCLE every (4) months.
Use: "Tide Washing Machine Cleaner"
Musty odor
L-O-N-G cycle times
Dingy/yellowing whites
Suds error message
Slow spin speeds
Intermittent water leaks (from rear of washer)
And other annoying symptoms which vary brand-to brand.
Read below:
The *correct* amount of HE (High Efficiency) detergent that should be used in any front load or agitatorless top load washer with tub sizes 3.0 cu ft and larger is as follows:
HE: (2) Tablespoons Per Wash Load
HE 2X: (1) Tablespoon
HE 3X: (1) Teaspoon
Perform a TUB CLEAN CYCLE every (4) months.
Use: "Tide Washing Machine Cleaner"
#4
bikesrfun
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- Merit Apprentice Appliantologist
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- 21 posts
Ikkō-ikki
Posted 24 January 2013 - 06:25 AM
Post the SERIAL NUMBER.
Serial Number 612KRTA00433. Already had the LG warranty repair for the lights staying on about two years ago.
Edited by bikesrfun, 24 January 2013 - 06:26 AM.
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