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Bosch·Oven / Rangehigh severity
Bosch Error Code E3
Open oven sensor
Common Causes
- 1Sensor wire broken
- 2Sensor disconnected
- 3Sensor element open circuit
Step-by-Step Troubleshooting
- 1
Disconnect power and locate the oven temperature sensor (rear wall of oven cavity)
- 2
Check sensor connector at control board for loose or corroded pins
- 3
Measure sensor resistance at connector (expect 1080-1100 ohms at room temperature)
- 4
If open circuit, trace wiring from sensor to board — look for pinch points or heat damage
Pro Diagnostic Tip
BSH oven sensors are NTC thermistors with a characteristic resistance curve. At 350F, expect ~200 ohms. If the sensor reads correct at room temp but fails at operating temperature, the NTC element is cracking internally — replace even if cold test passes.
You Might Also Notice
- •Oven will not heat
- •Temperature display shows abnormal reading
- •Error appears after preheat
Parts, Cost & Difficulty
Repair Difficulty
Moderate — Some Experience NeededEstimated Repair Cost
$100–$220
Parts + labor. Free diagnosis with repair.
Parts That May Need Replacement
12-009-872-001 (oven temperature sensor/NTC probe)
Do You Have the Right Tools?
Combustion analyzer ($300), igniter tester ($120), temperature calibrator ($150), and gas pressure manometer. Our technician arrives with $15K+ in professional tools — your diagnostic is free.
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Safety First — Know the Risks
Gas ovens involve live gas lines — a loose connection creates explosion and carbon monoxide risk. Electric ovens run on 240V circuits. Our techs are licensed and insured — let them handle the risk.
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Get Professional Help Now
Error code E3 is a high-severity issue that can cause further damage to your oven / range if left unresolved. A licensed technician can diagnose and fix it the same day.
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Frequently Asked Questions
What does Bosch error code E3 mean?
Bosch error code E3 indicates: Open oven sensor. This is a high-severity issue affecting your oven / range.
How do I fix Bosch error code E3?
Disconnect power and locate the oven temperature sensor (rear wall of oven cavity) Then, Check sensor connector at control board for loose or corroded pins Then, Measure sensor resistance at connector (expect 1080-1100 ohms at room temperature) There are 1 more steps — see the full troubleshooting guide above. This repair typically requires professional tools and expertise.
How do I know if my oven / range has error E3?
Besides the error code on the display, common signs include: Oven will not heat; Temperature display shows abnormal reading; Error appears after preheat. If you notice any of these symptoms, check your oven / range's display panel for error code E3.
How much does it cost to fix Bosch E3?
Repair costs for Bosch E3 typically range from $100 to $220 depending on the specific cause and parts needed. EasyBear offers free diagnosis when you proceed with the repair. Call (415) 795-7300 for a same-day appointment.