What E4 Means
E4 on a Pro range means the oven temperature sensor circuit is shorted, sending the control board an invalid reading rather than no reading at all.
Common Causes of E4
- Failed temperature sensor sending a shorted signal
- Moisture intrusion into the sensor connector
- Damaged sensor wiring insulation
🔧 One Safe Check You Can Try
There isn't a safe at-home test for this — it requires multimeter testing of the sensor circuit on a de-energized range, which is technician work.
⚠ Why You Shouldn't Go Further Than That
- A shorted sensor circuit can still carry voltage to its connector; testing it without full power isolation is a shock risk.
- The sensor sits inside the cavity near the broil element, where careless removal can damage surrounding insulation.
- This fault looks similar to E3 from the outside, and correctly distinguishing an open circuit from a shorted one requires proper test equipment.
- A sensor reinstalled even slightly out of position continues reading inaccurately even after replacement.
- Cavity access for this repair typically voids the remaining warranty.