Error code · Range

LG Range Codes F1, F2: Upper Oven Temperature Probe

Medium · inspection needed

Code: F1, F2
Appliance: Range
Brand: LG
Warranty: 30-day workmanship

What F1, F2 means

On LG electric and gas ranges with a numeric F-code display, F1 and F2 are listed as two separate entries with the same wording: an upper oven thermistor error. The thermistor is the temperature probe that tells the oven control how hot the upper oven is. If its reading is lost or out of range, the oven stops heating and beeps with the code on the display. The list does not say which models show F1 and which show F2.

Common causes of F1, F2

The upper oven thermistor reading out of range
A wire or connector at the thermistor that is loose
A control that is not reading the probe signal

✓ One safe check you can try

1. Press CLEAR/OFF and retry whatever you were doing. 2. If the code returns, switch the range's circuit breaker off for 30 seconds and back on. 3. Let the oven cool, then test one short bake. If F1 or F2 shows again, stop using the oven.

! Why to stop there

The two codes share one description, so we test the probe circuit to see which reading is affected.
A probe that reads wrong can be a part problem or a connection problem, and we find out which before replacing anything.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Range codes

F17LG Range Code F17: Convection Fan PFLG Range Code PF: Power Loss Notice F19LG Range Code F19: Oven Not Heating Sb, 5bLG Range Sb or 5b: Sabbath Mode Is On F20LG Range Code F20: Lower Oven Door Lock F21, F22, F24, F25LG Range Codes F21, F22, F24, F25: Steam Sensors F27LG Range Code F27: Cooling Fan During Self Clean F3LG Range Code F3: Touch Pad Keys

F1, F2F1, F2 questions

Are F1 and F2 different problems?

They are listed as two entries with the same wording, an upper oven thermistor error. We test the probe circuit to see what each reading means on your range.

Can I keep cooking on the cooktop?

The code concerns the oven. Burners may still work, but check your display behavior. If the oven will not heat, do not rely on it until we have checked it. Burners usually run on their own controls, though we confirm that on your model.

Will the breaker reset fix it?

It can clear a one-time glitch in the probe reading. If F1 or F2 returns after the 30-second reset, we test the probe and its wiring.

Book a visit

Still seeing F1, F2?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 597-5662