Error code · Range

LG Range Code F38: Main Board and Inverter

Medium · inspection needed

Code: F38
Appliance: Range
Brand: LG
Warranty: 30-day workmanship

What F38 means

On LG electric and gas ranges with a numeric F-code display, F38 is listed as a communication error between the main board and the inverter. The inverter is a power-control circuit, and the main board must be able to talk to it. F38 means that link is not working. A range with an inverter is usually an induction model, but the list does not say so, so we confirm that on your range.

Common causes of F38

The link between the main board and the inverter
A cable or connector that is loose
The inverter board not answering
A main board that is not sending

✓ One safe check you can try

1. Switch the circuit breaker off for 30 seconds, then back on. 2. Try the function again. 3. If F38 appears again, stop using the range and call us. 4. Keep the cooktop and oven off until the code is cleared, and tell us whether any element still heats.

! Why to stop there

F38 names a link between two boards, so we test the connection before replacing either one.
We confirm which board has stopped talking, because replacing both is rarely needed.

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.

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Other Range codes

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F38F38 questions

What is F38 reporting on this range?

The main board and the inverter are not communicating. The control cannot run the function that depends on the inverter. Any function that needs the inverter stays off without that link.

Does F38 mean induction?

An inverter often means an induction cooktop, but the list does not say. We check your model. The word inverter hints at induction, so we confirm on your range.

Will a reset fix F38?

It can, if the link dropped just once, which a power dip can cause. If F38 returns after the reset, we test the link between the boards and their connectors.

Book a visit

Still seeing F38?

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

(713) 597-5662