Sub Zero 700TC -
rcantrell52 - 04-20-2019
All,
If you have the above refrigerator and see the Service message with a code of 40 50 your thermistor has developed a problem. The thermistor is located on the circuit board. You can replace the thermistor by itself or replace both the thermistor and circuit board.
Reese Cantrell
Newell Coach 1242