LG Cooktop E5 Error: Temp sensor open circuit
LG cooktop error — here’s what you need to know. The E5 error code on your LG cooktop indicates open circuit in the temperature sensor. This is a High severity issue. What Does E5 Mean on an LG Cooktop? The E5 error code means the cooktop’s control board cannot read the temperature sensor — the […]
~35%
DIY Fixable
From 30
Typical Repair Cost
45–90 min
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
Maybe. Other zones may be used with caution if they are operating normally. Do not attempt to use the zone displaying E5, as it has no over-temperature protection active.
Can I reset the code?
Yes. A power cycle may temporarily clear E5 if caused by a connection dropout, but a failed sensor will cause the code to return as soon as the zone is activated.
When to stop immediately?
Stop if you notice: Stop using the affected zone until the sensor fault is repaired — that zone has no thermal protection., Stop if all zones display E5 simultaneously — the control board sensor circuit has failed and the cooktop must not be used..
Symptoms You May Notice
Affected cooking zone shuts off and will not restart
The zone that has the faulty sensor goes offline and displays E5; it cannot be restarted because the safety system requires a valid temperature reading before allowing the zone to heat.
E5 code on the zone display
The cooktop shows E5 on the zone indicator or main display immediately when that zone is activated, as the board cannot obtain a sensor reading.
Other cooking zones may continue to work normally
On multi-zone cooktops, zones with functioning sensors will typically continue to operate normally, isolating the fault to the specific zone with the open sensor circuit.
Inconsistent temperature performance
The cooktop runs too hot, too cold, or cycles erratically because the control board receives inaccurate temperature readings from the faulty sensor.
Possible Causes
Failed temperature sensor (NTC thermistor)
The NTC thermistor or RTD probe monitoring the zone or control electronics has failed internally, breaking its circuit and producing an open reading on the control board's sensor input.
Requires ProfessionalDisconnected sensor wiring connector
The small connector linking the temperature sensor to the control board wiring harness has become loose or detached, interrupting the sensor signal path.
DIY PossibleFaulty control board sensor input circuit
The control board's temperature sensor input has failed, generating a false open-circuit reading even when the sensor and wiring are electrically intact.
Requires ProfessionalSafe Checks You Can Do
-
1
Power cycle the cooktop
Turn off the cooktop's circuit breaker for 60 seconds and restore power. If E5 was caused by a transient sensor signal dropout, a full reset may clear it.
-
2
Check for a loose sensor connector
With power off and the cooktop accessible from below (remove base access panel if equipped), locate the sensor wiring harness connectors on the control board. Firmly reseat any that appear loose.
-
3
Test whether other zones work normally
After resetting, test each zone individually. If only the original zone shows E5 while all others work, the fault is localized to that zone's sensor or wiring. If all zones show E5, the control board's sensor circuit has failed.
When to Call a Professional
Contact a qualified technician if:
- E5 returns immediately after reseating all sensor wiring connectors.
- The temperature sensor is bonded to the underside of the glass cooktop and requires professional removal.
- All zones display E5, indicating a control board sensor circuit failure.
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
Cooktop Repair Service Schedule Appointment