LG · Range / Oven error code

1 / 2 / 3 (cooktop)Cooktop thermistor error

Single source High-voltage / caution

Unlock what this code means, its causes, tests and parts

Full library + AI assistant for $34.90, one time.

OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work.

Related diagnostic guides

Guide · Range / Oven

Oven temperature inaccurate (runs hot or cold)

First measure properly: ovens cycle above and below setpoint, so use an average over several cycles. Small offsets are fixed with the control's calibration setting; large errors usually mean a drifting sensor, a weak element or igniter, or a door gasket leak.

5 steps ~60 mineasy

Component test · Range / Oven

How to test an oven RTD temperature sensor

Most electronic ovens use a platinum RTD probe, which works the opposite way to an NTC: resistance rises with heat. Many common sensors read about 1,080 Ω at room temperature and climb roughly 2 Ω per °F.

6 steps ~20 mineasy

Component test · Range / Oven

Oven door lock motor and lock switches (self-clean)

Self-clean ovens use a small motor or solenoid with cam switches that tell the control the lock position. A lock stuck after self-clean is often a cooled-down timing issue; check the motor, the switches and the control output.

5 steps ~40 minmoderate

More LG range / oven codes

LG · Range / Oven

4 (cooktop)

Object/water on touch pads

Single source

LG · Range / Oven

6 (cooktop)

Low voltage

Single source High-voltage / caution

LG · Range / Oven

CF1-CF4

Top zone sensor open/short

Cross-checked High-voltage / caution

LG · Range / Oven

CF5 / CF6

IGBT sensor

Single source High-voltage / caution

LG · Range / Oven

CF7 / CF8

Module communication

Single source High-voltage / caution

LG · Range / Oven

CFA

Over-current (or communication)

Single source High-voltage / caution