An LG LREL6323 whose oven does not heat while the cooktop still works has a fault in the oven's own heating path, and the checks run from the simple to the technical. This 6.3 cubic foot electric range has a radiant smoothtop, Fan Convection and an electric oven with a bake element in the floor and a broil element in the roof. The cooktop and the oven share the supply but have separate elements, so a working cooktop shows that the range has power.
The checks in more detail
A cold oven therefore points at the settings, the elements or the control. Start with the settings. Check that the oven is not in Sabbath mode or a demo or showroom mode, in which the display works but the elements stay off, and that the control is not locked. Check that a self-clean has not left the oven locked or in a cleaning state, and that a timed or delayed bake has not been set to start later.
Choose Bake at 350 degrees Fahrenheit and watch the display climb. If a code such as F1 or F3 appears, note it, because LG ranges use F codes for sensor and control faults. Then the electrical side. Check the double breaker for the range: both halves must be on, and if one half has tripped, the cooktop may work on one leg while the oven's elements, which need both, stay cold. Reset the breaker fully off and on.
Look at the bake element when the oven is set to bake: after a few minutes it should glow orange. An element that is blistered, broken or dark is usually failed and is a modest part. If the element glows but the oven stays cold, the door may be open slightly or the temperature sensor may be wrong. If neither element glows, the control or a relay is the likely fault. Unplug or switch off before touching the elements. Quote LREL6323S and the serial number to LG, and note any F code.
Differential
Likely causes of “LG LREL6323 electric range oven will not heat or preheat”, and how to tell them apart
- 1
Sabbath or demo mode
What separates it The display works and the elements stay off
How to confirm Check the settings and turn the mode off
- 2
Half of the double breaker tripped
What separates it The cooktop works and the oven is cold
How to confirm Reset the double breaker fully
- 3
A failed bake element
What separates it The element never glows
How to confirm Replace the element
- 4
A failed sensor or control
What separates it An F code appears or neither element glows
How to confirm Technician check
- 5
A cycle that has not started
What separates it A delay or a clean is set
How to confirm Cancel the delay or the clean
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether the cooktop works
- Whether a code is shown
- Whether the bake element glows
- Whether a mode or delay is set
Try in this order
0 of 6 completedCheck the settings
ReversibleSabbath, demo, lock, delay.
Reset the double breaker
ReversibleFully off and on.
Set Bake to 350
ReversibleWatch the display.
Look at the bake element
ReversibleIt should glow.
Note any F code
ReversibleBefore calling.
Call LG
ReversibleIf neither element glows.
Model-specific
What is true of this model and not of its siblings
- Separate elements
- The oven's bake and broil elements are separate from the cooktop.
- Modes
- Sabbath and demo modes stop normal heating.
- The double breaker
- Both halves must be on.
- The element
- A glowing element is working.
- F codes
- They name sensor and control faults.
- LG help
- Quote LREL6323S and the serial number.
- Parts for this problem on the LREL6323 (RepairClinic, 2026-09-21)
- pcb assembly, display, part number EBR89296403, at $128.05.
Stop boundary
When this stops being a self-service repair
- !Switch off at the breaker before touching an element
- !Do not use a damaged element
- !Call LG for neither element glowing
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Why does my oven not heat when the cooktop works?+
The oven's elements or control, or half a breaker.
What is Sabbath mode?+
A setting that disables normal heating.
Can an element be replaced?+
Yes, it is a modest part.
What does an F code mean?+
A sensor or control fault.
Is it a breaker?+
Possibly half of it.